Prof. F. Javier Garcia de Abajo Profile

Prof. F. Javier Garcia de Abajo

ICREA Professor and Nanophotonics Group Leader at ICFO - Institut de Ciències Fotòniques

SPIE Involvement:

Conference Program Committee | Author | Editor

Publications (73)

Proceedings Article | 19 October 2023 Presentation

Two-dimensional materials for nanophotonics

F. Javier García de Abajo

Proceedings Volume PC12646, PC1264619 (2023) https://doi.org/10.1117/12.2677679

KEYWORDS: 2D materials, Quantum nanophotonics, Ultrafast phenomena, Quantum plasmonics, Quantum phenomena, Quantum optics applications, Quantum optics, Quantum light, Optical properties, Nonlinear optics

Read Abstract +

Proceedings Article | 5 October 2023 Presentation

Tuning plasmonic coupling of nanocube dimers via nanoscale gap morphology

Yina Wu, Andrea Konečná, ShinHum Cho, Delia Milliron, Jordan Hachtel, F. Javier García de Abajo

Proceedings Volume PC12648, PC1264808 (2023) https://doi.org/10.1117/12.2676786

KEYWORDS: Plasmonics, Plasmons, Information operations, Spectroscopy, Nanostructures, Nanoparticles, Visible radiation, Transparency, Thin films, Scanning transmission electron microscopy

Read Abstract +

Proceedings Article | 5 October 2023 Presentation

Plasmons in atomically thin metals

F. Javier García de Abajo

Proceedings Volume PC12648, PC1264817 (2023) https://doi.org/10.1117/12.2678231

KEYWORDS: Plasmons, Metals, Visible radiation, Optoelectronics, Optical sensing

Read Abstract +

Proceedings Article | 5 October 2023 Presentation

Exploring the limits to spatially resolved optical spectroscopy with free electrons

F. Javier García de Abajo

Proceedings Volume PC12654, PC126540V (2023) https://doi.org/10.1117/12.2678234

KEYWORDS: Electrons, Optical spectroscopy, Ultrafast phenomena, Temporal resolution, Plasmonics, Spatial resolution, Solids, Nanostructuring

Read Abstract +

Proceedings Article | 28 September 2023 Presentation

Generation of single and entangled-pair polaritons

F. Javier García de Abajo

Proceedings Volume PC12657, PC1265703 (2023) https://doi.org/10.1117/12.2678232

KEYWORDS: Polaritons, Quantum entanglement, Electrons, Quantum tunneling, Quantum emitters, Quantum advantages, Light sources and illumination

Read Abstract +

Proceedings Article | 6 June 2023 Paper

Optimizing the coupling of light to plasmons through engineered dipolar scatterers

Saad Abdullah, Jan Krpensky, Eduardo J. Dias, Vahagn Mkhitaryan, F. Javier García de Abajo

Proceedings Volume 12568, 125680S (2023) https://doi.org/10.1117/12.2665778

KEYWORDS: Polaritons, Plasmons, Scattering, Gold, Silica, Quenching, Quantum optics experiments, Particles, Optical surfaces, Dielectrics

Read Abstract +

Proceedings Article | 17 March 2023 Presentation

Nonlocal and cascaded effects in nonlinear graphene nanoplasmonics

Theis Pilegaard Rasmussen, Álvaro Rodríguez Echarri, Javier García de Abajo, Joel Cox

Proceedings Volume PC12405, PC124050P (2023) https://doi.org/10.1117/12.2648795

KEYWORDS: Graphene, Plasmonics, Nanoplasmonics, Plasmons, Nonlinear response, Nonlinear optics, Near field optics, Near field, Nanostructures, Third-harmonic generation

Read Abstract +

Proceedings Article | 4 October 2022 Presentation

Quantum-phase two-dimensional materials (Conference Presentation)

Valerio Di Giulio, P. André Gonçalves, Javier García de Abajo

Proceedings Volume PC12206, PC122060I (2022) https://doi.org/10.1117/12.2633361

KEYWORDS: Semiconductors, Thermography, Physics, Materials science, Graphene, Free space, Electronics engineering, Electronic components, Electron transport

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Tunable nonlinear vibrational response of monolayer hBN

Fadil Iyikanat, Andrea Konecna, Javier García de Abajo

Proceedings Volume PC12228, PC122280K (2022) https://doi.org/10.1117/12.2633142

KEYWORDS: Mid-IR, Optoelectronics, Nonlinear response, Modulation, Third-harmonic generation, Quantum optics, Polaritons, Phonons, Nonlinear optics, Kerr effect

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Optical manipulation of matter waves

Kamran Akbari, Valerio Di Giulio, Javier Garcia de Abajo

Proceedings Volume PC12198, PC121980T (2022) https://doi.org/10.1117/12.2633349

KEYWORDS: Electrons, Chemical species, Optical manipulation, Photonic microstructures, Near field, Molecules, Electron microscopy, Ultrafast phenomena, Particles, Motion controllers

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Solving the in/out-coupling problem in strongly-confined polaritonics

F. Javier García de Abajo

Proceedings Volume PC12200, PC1220005 (2022) https://doi.org/10.1117/12.2640396

KEYWORDS: Polaritons, Nanophotonics, Light wave propagation

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Advances in the plasmonic response of crystalline atomically thin films

Álvaro Rodríguez Echarri, Joel Cox, Javier García de Abajo

Proceedings Volume PC12197, PC121971B (2022) https://doi.org/10.1117/12.2633392

KEYWORDS: Crystals, Plasmonics, Thin films, Electrons, Plasmons, Photonic crystals, Nonlinear crystals, Nanophotonics, Metals, Third-harmonic generation

Read Abstract +

Proceedings Article | 3 October 2022 Poster

Plasmon Satellites in Photoemission from Plasmonic Nanoparticles

Paulo André Gonçalves, F. Javier García de Abajo

Proceedings Volume PC12197, PC121971S (2022) https://doi.org/10.1117/12.2633582

KEYWORDS: Plasmons, Satellites, Nanostructures, Plasmonics, Nanoparticles, Electrons, Earth observing sensors, Ultrafast phenomena, Photons, Surface plasmons

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Quantifying quantum nonlocal effects in nanoplasmonics using electron-beam spectroscopies

Paulo André Gonçalves, F. Javier García de Abajo

Proceedings Volume PC12197, PC121970S (2022) https://doi.org/10.1117/12.2633608

KEYWORDS: Spectroscopy, Nanoplasmonics, Near field optics, Quantum physics, Quantum optics, Near field, Systems modeling, Plasmonics, Nanostructures, Nanophotonics

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Fundamental limits and complete coupling of light into polaritons (Conference Presentation)

Eduardo J. Brioso Dias, Javier García de Abajo

Proceedings Volume PC12195, PC121950F (2022) https://doi.org/10.1117/12.2633644

KEYWORDS: Polaritons, Telecommunications, Surface plasmons, Scattering, Polarizability, Plasmonics, Photon polarization, Nanophotonics, Modulation, Metals

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Quantum interactions enable a new generation of low-dimensional materials (Conference Presentation)

F. Javier García de Abajo, Valerio Di Giulio, Paulo André Gonçalves

Proceedings Volume PC12195, PC121950X (2022) https://doi.org/10.1117/12.2633947

KEYWORDS: Thermography, Semiconductors, Nanostructures, Electrons

Read Abstract +

Proceedings Article | 3 October 2022 Presentation

Photonics with atomically thin materials

F. Javier García de Abajo

Proceedings Volume PC12196, PC121960C (2022) https://doi.org/10.1117/12.2633948

KEYWORDS: Photonics, Semiconductors, Plasmons, Nonlinear response, Metals, Silver, Quantum optics, Polaritons, Optical sensing, Optical engineering

Read Abstract +

Proceedings Article | 30 May 2022 Presentation

Quantum aspects of the interaction between free electron, light, and photonic nanostructures

F. Javier García de Abajo

Proceedings Volume 12132, 1213205 (2022) https://doi.org/10.1117/12.2631082

Read Abstract +

Proceedings Article | 24 May 2022 Presentation

Guiding light with surface exciton-polaritons in atomically thin superlattices

S.A Elrafei, T.V. Raziman, S. de Vega, F. J. García de Abajo, J. Gómez Rivas, A.G. Curto

Proceedings Volume PC12131, PC121310O (2022) https://doi.org/10.1117/12.2621488

KEYWORDS: Superlattices, Heterojunctions, Semiconductors, Magnetism, Waveguides, Visible radiation, Photonics, Modulators, Magnetic semiconductors, Excitons

Read Abstract +

Proceedings Article | 1 April 2022 Presentation

Surface response functions of crystal-oriented noble metals in plasmonic and optoelectronic applications

Álvaro Rodríguez Echarri, P. André Gonçalves, Christos Tserkezis, F. Javier García de Abajo, N. Asger Mortensen, Joel Cox

Proceedings Volume PC11995, PC1199505 (2022) https://doi.org/10.1117/12.2609457

KEYWORDS: Metals, Crystals, Plasmons, Plasmonics, Optoelectronics, Quantum optics, Graphene, Thin films, Optical simulations, Nanostructures

Read Abstract +

Proceedings Article | 7 March 2022 Presentation

All-optical excitation and ultrafast modulation of plasmons in 2D materials

Eduardo J. C. Dias, Renwen Yu, F. Javier García de Abajo

Proceedings Volume PC11999, PC119990M (2022) https://doi.org/10.1117/12.2609477

KEYWORDS: Plasmons, Graphene, Modulation, Metals, Ultrafast imaging, Photothermal effect, Temperature metrology, Silver, Optical lithography, Acoustics

Read Abstract +

Proceedings Article | 7 March 2022 Presentation

Modulation of cathodoluminescence emission by interference with external light

Valerio Di Giulio, Ofer Kfir, Claus Ropers, F. Javier García de Abajo

Proceedings Volume PC11999, PC119990O (2022) https://doi.org/10.1117/12.2607364

KEYWORDS: Near field optics, Modulation, Charged particle optics, Near field, Electron microscopy, Ultrafast phenomena, Transmission electron microscopy, Spectral resolution, Spatial resolution, Quantum optics

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Vibrational nonlinear response in monolayer hBN

Fadil Iyikanat, Andrea Konecna, Javier Garcia de Abajo

Proceedings Volume PC12003, PC1200307 (2022) https://doi.org/10.1117/12.2609022

KEYWORDS: Nonlinear response, Mid-IR, Optoelectronics, Modulation, Third-harmonic generation, Quantum optics, Polaritons, Phonons, Nonlinear optics, Kerr effect

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Tuning plasmons of doped indium oxide nanostructures via nanometric gaps

Yina Wu, Andrea Konecná, Jordan Hachtel, F. Javier García de Abajo

Proceedings Volume PC12002, PC1200201 (2022) https://doi.org/10.1117/12.2609494

KEYWORDS: Plasmons, Nanostructures, Indium oxide, Information operations, Spectroscopy, Plasmonics, Nanoparticles, Visible radiation, Transparency, Thin films

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Maximal coupling of light into 2D polaritons

Eduardo J. C. Dias, Javier García de Abajo

Proceedings Volume PC12003, PC120030D (2022) https://doi.org/10.1117/12.2609495

KEYWORDS: Polaritons, Waveguide modes, Waveguides, Telecommunications, Surface plasmons, Silver, Silica, Plasmons, Plasmonics, Photon polarization

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Optically enhanced electron-atom interaction

Eduardo Arqué López, Valerio Di Giulio, Javier García de Abajo

Proceedings Volume PC12009, PC120090R (2022) https://doi.org/10.1117/12.2609025

KEYWORDS: Near field optics, Molecules, Molecular photonics, Chemical species, Photons, Photonic microstructures, Near field, Molecular spectroscopy, Molecular lasers, Electron microscopy

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Quantum surface-response in nanoplasmonics probed by electron spectroscopies

Paulo André Gonçalves, F. Javier García de Abajo

Proceedings Volume PC12010, PC120101B (2022) https://doi.org/10.1117/12.2609060

KEYWORDS: Spectroscopy, Nanoplasmonics, Nanostructures, Plasmonics, Silver, Quantum computing, Nanophotonics, Nanofabrication, Gold, Electrodynamics

Read Abstract +

Proceedings Article | 5 March 2022 Presentation

Progress in the optical response of crystalline atomically thin films

Álvaro Rodríguez Echarri, Joel Cox, Fadil Iyikanat, F. Javier García de Abajo

Proceedings Volume PC12003, PC120030K (2022) https://doi.org/10.1117/12.2609481

KEYWORDS: Crystals, Crystal optics, Plasmons, Nonlinear crystals, Plasmonics, Photonic crystals, Near field optics, Electrons, Nanophotonics, Metals

Read Abstract +

Proceedings Article | 1 August 2021 Presentation

Maximal coupling of light into 2D polaritons

Eduardo J. C. Dias, Javier García de Abajo

Proceedings Volume 11802, 118020F (2021) https://doi.org/10.1117/12.2594829

KEYWORDS: Polaritons, Polarizability, Telecommunications, Scattering, Plasmons, Plasmonics, Photon polarization, Modulation, Light wave propagation, Light scattering

Read Abstract +

Proceedings Article | 1 August 2021 Presentation

Quantum size- and nonlocal-effects in the plasmonic response of graphene nano-ribbons

Álvaro Rodríguez Echarri, Javier García de Abajo, Joel Cox

Proceedings Volume 11802, 118020G (2021) https://doi.org/10.1117/12.2594916

KEYWORDS: Graphene, Plasmons, Plasmonics, Second-harmonic generation, Optoelectronics, Nanostructuring, Nanophotonics, Metals, Carbon, Band structure simulations

Read Abstract +

Proceedings Article | 1 August 2021 Presentation

Advances in the optical response of crystalline atomically-thin films

Álvaro Rodríguez Echarri, Joel Cox, Fadil Iyikanat, Javier García de Abajo

Proceedings Volume 11797, 117970X (2021) https://doi.org/10.1117/12.2594892

KEYWORDS: Crystals, Crystal optics, Plasmons, Nonlinear crystals, Plasmonics, Photonic crystals, Near field optics, Electrons, Nanophotonics, Metals

Read Abstract +

Proceedings Article | 1 August 2021 Presentation

Ultrafast thermal manipulation of plasmons in atomically thin films

Eduardo J. C. Dias, Renwen Yu, Javier García de Abajo

Proceedings Volume 11795, 1179521 (2021) https://doi.org/10.1117/12.2594850

Read Abstract +

Proceedings Article | 1 August 2021 Presentation

Quantum interactions between free electrons and metamaterials

F. Javier García de Abajo

Proceedings Volume 11795, 117951L (2021) https://doi.org/10.1117/12.2596111

KEYWORDS: Electrons, Metamaterials, Nanomaterials, Electron microscopy, Electron beams

Read Abstract +

Proceedings Article | 18 April 2021 Presentation

Ultrafast thermal manipulation of 2D plasmons

Eduardo Brioso Dias, Renwen Yu, Javier García de Abajo

Proceedings Volume 11769, 1176909 (2021) https://doi.org/10.1117/12.2589499

KEYWORDS: Plasmons, Graphene, Metals, Modulation, Ultrafast imaging, Photothermal effect, Temperature metrology, Silver, Optical lithography, Acoustics

Read Abstract +

Proceedings Article | 18 April 2021 Presentation

Enhancement of the intrinsic nonlinear response in few-atom-thick metallic films

Álvaro Rodríguez Echarri, Fadil Iyikanat, Joel Cox, F. Javier García de Abajo

Proceedings Volume 11770, 1177007 (2021) https://doi.org/10.1117/12.2589115

KEYWORDS: Crystals, Nonlinear crystals, Nonlinear response, Plasmons, Plasmonics, Photonic crystals, Metals, Nanophotonics, Electrons, Thin films

Read Abstract +

Proceedings Article | 18 April 2021 Presentation

Quantum-size and nonlinear effects in the plasmonic response of graphene nanoribbons

Álvaro Rodríguez Echarri, Joel Cox, F. Javier García de Abajo

Proceedings Volume 11770, 1177006 (2021) https://doi.org/10.1117/12.2589114

KEYWORDS: Graphene, Plasmons, Plasmonics, Second-harmonic generation, Optoelectronics, Nanostructuring, Nanophotonics, Metals, Carbon, Band structure simulations

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Nonlocal and quantum finite-size effects in the use of guided graphene plasmons

Álvaro Rodríguez Echarri, Joel Cox, Javier Garía de Abajo

Proceedings Volume 11688, 116880P (2021) https://doi.org/10.1117/12.2582456

KEYWORDS: Plasmons, Graphene, Second-harmonic generation, Plasmonics, Optoelectronics, Nanostructuring, Nanophotonics, Metals, Carbon, Band structure simulations

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Ultrafast optothermal generation and modulation of 2D plasmons

Eduardo Brioso Dias, Renwen Yu, Javier García de Abajo

Proceedings Volume 11684, 116840T (2021) https://doi.org/10.1117/12.2583400

KEYWORDS: Plasmons, Graphene, Modulation, Metals, Ultrafast imaging, Ultrafast phenomena, Photothermal effect, Temperature metrology, Silver, Optical pumping

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Fundamental limits in the coupling between light and 2D polaritons

Eduardo Brioso Dias, Javier García de Abajo

Proceedings Volume 11688, 116880D (2021) https://doi.org/10.1117/12.2583401

Read Abstract +

Proceedings Article | 5 March 2021 Presentation

Enhanced nonlinear optical response in atomically thin films

Álvaro Rodríguez Echarri, Joel Cox, Fadil Iyikanat, Javier Garía de Abajo

Proceedings Volume 11670, 116700I (2021) https://doi.org/10.1117/12.2582455

KEYWORDS: Crystals, Nonlinear crystals, Thin films, Plasmons, Plasmonics, Photonic crystals, Metals, Nanophotonics, Electrons, Quantum optics

Read Abstract +

Proceedings Article | 22 August 2020 Presentation

Coupling between light and 2D polaritons: Fundamental limits and how to overcome them

Eduardo Brioso Dias, Javier García de Abajo

Proceedings Volume 11462, 114621E (2020) https://doi.org/10.1117/12.2568655

KEYWORDS: Polaritons, Graphene, Plasmonics, Polarizability, Absorption, Telecommunications, Photon polarization, Light wave propagation, Light scattering, Scattering

Read Abstract +

Proceedings Article | 22 August 2020 Presentation

Thermal manipulation of plasmons in atomically thin films

Eduardo Brioso Dias, Renwen Yu, Javier García de Abajo

Proceedings Volume 11462, 114620G (2020) https://doi.org/10.1117/12.2568491

KEYWORDS: Plasmons, Graphene, Thin films, Modulation, Electrons, Diffraction gratings, Metals, Visible radiation, Photothermal effect, Cancer

Read Abstract +

Proceedings Article | 20 August 2020 Presentation

Nonlocal and quantum finite-size effects in guided graphene plasmons

Álvaro Rodríguez Echarri, F. Javier García de Abajo, Joel Cox

Proceedings Volume 11471, 1147109 (2020) https://doi.org/10.1117/12.2568680

KEYWORDS: Graphene, Plasmons, Nanostructuring, Metals, Carbon, Nanophotonics, Optoelectronics, Band structure simulations, Plasmonics, Second-harmonic generation

Read Abstract +

Proceedings Article | 20 August 2020 Presentation

Nonlinear and nonlocal optics in crystalline atomically thin films

Álvaro Rodríguez Echarri, Joel Cox, F. Javier García de Abajo

Proceedings Volume 11471, 1147107 (2020) https://doi.org/10.1117/12.2567918

KEYWORDS: Crystals, Nonlinear crystals, Nonlinear optics, Crystal optics, Plasmons, Metals, Photonic crystals, Nanophotonics, Plasmonics, Electrons

Read Abstract +

Proceedings Article | 20 August 2020 Presentation

Quantum description of electron energy loss spectroscopy in crystalline films

Álvaro Rodríguez Echarri, Enok Johannes Haahr Skjølstrup, Thomas Pedersen, Francisco Javier García de Abajo

Proceedings Volume 11462, 114620K (2020) https://doi.org/10.1117/12.2568699

KEYWORDS: Spectroscopy, Crystals, Quantum wells, Aluminium phosphide, Electron beams, Optical properties, Spatial resolution, Silver, Gold, Surface plasmons

Read Abstract +

Proceedings Article | 20 August 2020 Presentation

Nonlinear plasmonics with graphene and atomically thin materials

Joel Cox, F. Javier García de Abajo

Proceedings Volume 11461, 1146127 (2020) https://doi.org/10.1117/12.2567881

KEYWORDS: Graphene, Plasmonics, Plasmons, Nanostructuring, Light-matter interactions, Nanostructures, Switching, Nonlinear optics, Nonlinear response, Nanophotonics

Read Abstract +

Proceedings Article | 19 August 2020 Poster

Quantum effects in the interaction between optical excitations and fast electrons

Valerio Di Giulio, Mathieu Kociak, F. Javier García de Abajo

Proceedings Volume 11462, 1146230 (2020) https://doi.org/10.1117/12.2568894

KEYWORDS: Electron beams, Near field optics, Quantum optics, Signal attenuation, Light sources, Electron microscopes, Signal analyzers, Optical filters, Polarization, Spectroscopy

Read Abstract +

Proceedings Article | 10 September 2019 Presentation

Acoustic graphene plasmons in atomically thin heterostructures (Conference Presentation)

Álvaro Rodríguez Echarri, Joel D. Cox, F. Javier García de Abajo

Proceedings Volume 11091, 110910D (2019) https://doi.org/10.1117/12.2529191

KEYWORDS: Graphene, Metals, Plasmons, Heterojunctions, Acoustics, Dielectrics, Nanofabrication, Nanotechnology, Control systems, Optoelectronics

Read Abstract +

Recent advances in nanofabrication technology now enable unprecedented control over 2D heterostructures, in which single- or few-atom thick materials with synergetic opto-electronic properties can be combined to develop next-generation devices [1,2]. Precise control of light can be achieved at the interface between 2D metal and dielectric layers, where surface plasmon polaritons strongly confine electromagnetic energy. Here we reveal quantum and finite-size effects in hybrid systems consisting of graphene and few-atomic-layer noble metals, based on a quantum description that captures the electronic band structure of these materials. We also examine the case where a dielectric such hexagonal Boron Nitride (hBN) is placed between graphene and the metal film. Specifically, we simulate the graphene and metal within the random-phase approximation, incorporating in the metal phenomenological information on the main characteristics of the conduction electronic band structure, such as surface states, electron spill out, and a directional band gap associated with bulk atomic-layer corrugation [3]. These phenomena are found to play an important role in the metal screening of the plasmonic fields, determining the extent to which they propagate in the graphene layer. Remarkably, we find that a monoatomic metal layer is capable of pushing graphene plasmons toward the intraband transition region, rendering them acoustic, while the addition of more metal layers only produces minor changes in the dispersion but strongly affects the lifetime. We further find that a quantum approach is required to correctly account for the sizable Landau damping associated with single-particle excitations in the metal. We anticipate that these results will aid in the design of future platforms for extreme light-matter interaction of the nanoscale. References [1] D. N. Basov, M. M. Fogler and F. J. García de Abajo, Polaritons in van derWaals Materials. Science 354, aag1992 (2016). [2] D. Alcaraz Iranzo, S. Nanot, E. J. C. Dias, I. Epstein, C. Peng, D. K. Efetov, M. B. Lundeberg, R. Parret, J. Osmond, J. Y. Hong et al., Probing the ultimate plasmon confinement limits with a van der Waals heterostructure. Science 360, 291–295 (2018). [3] E. V. Chulkov, V. M. Silkin and P. M. Echenique, Surface science 437, 330-352 (1999) Acknowledgements This work has been supported in part by the Spanish MINECO (MAT2017-88492-R and SEV2015-0522), ERC (Advanced Grant 789104-eNANO), the Catalan CERCA Program, and Fundació Privada Cellex. A.R.E. acknowledges a grant cofounded by the Generalitat de Catalunya and the European Social Fund FEDER

Proceedings Article | 9 September 2019 Presentation

Thermo-optic single-plasmon blockade in graphene nanoislands (Conference Presentation)

Joel Cox, F. Javier García de Abajo

Proceedings Volume 11081, 110810Y (2019) https://doi.org/10.1117/12.2529505

KEYWORDS: Graphene, Plasmons, Thermal optics, Electrons, Absorption, Chemical analysis, Quantum efficiency, Metals, Nanostructures, Light-matter interactions

Read Abstract +

Proceedings Article | 9 September 2019 Presentation

Strong-field-driven dynamics and high-harmonic generation in interacting 1D systems (Conference Presentation)

Sandra de Vega, Joel Cox, Fernando Sols, Javier Garcia de Abajo

Proceedings Volume 11085, 1108504 (2019) https://doi.org/10.1117/12.2529209

KEYWORDS: Solid state electronics, Ultrafast phenomena, Chemical species, Harmonic generation, Crystals, Systems modeling, Ultraviolet radiation, Light sources, Chemical reactions, Tomography

Read Abstract +

Proceedings Article | 13 May 2019 Presentation

2D polaritonics: fundamental limits and prospects for applications (Conference Presentation)

F. Javier García de Abajo

Proceedings Volume 11031, 110310T (2019) https://doi.org/10.1117/12.2524392

KEYWORDS: Polaritons, Graphene, Transition metals, Metals, Optical sensing, Nonlinear optics, Quantum physics

Read Abstract +

Proceedings Article | 18 September 2018 Presentation

Transient nonlinear plasmonics in nanostructured graphene (Conference Presentation)

Joel Cox, Javier García de Abajo

Proceedings Volume 10734, 1073409 (2018) https://doi.org/10.1117/12.2321052

KEYWORDS: Graphene, Nanostructuring, Plasmonics, Plasmons, Nonlinear optics, Transient nonlinear optics, Absorption, Modulation, Nonlinear response, Temperature metrology

Read Abstract +

Proceedings Article | 18 September 2018 Presentation

Strong coupling enabled by nonlinear graphene plasmonics (Conference Presentation)

Joel Cox, Javier García de Abajo

Proceedings Volume 10734, 107340D (2018) https://doi.org/10.1117/12.2321065

KEYWORDS: Graphene, Plasmonics, Plasmons, Near field, Nonlinear response, Carbon, Infrared radiation, Solid state physics, Quantum dots, Mid-IR

Read Abstract +

Proceedings Article | 18 September 2018 Presentation

Quantum finite-size effects in the optical response of atomically thin metallic films (Conference Presentation)

Álvaro Rodríguez Echarri, Joel Cox, Javier García de Abajo

Proceedings Volume 10734, 1073406 (2018) https://doi.org/10.1117/12.2320970

KEYWORDS: Thin films, Metals, Electrons, Nanotechnology, Plasmons, Nanophotonics, Nanolithography, Electronic components, Photonic devices, Copper

Read Abstract +

Thin films have attracted a great deal of attention within the nanophotonics community due to their ability to strongly confine and manipulate light on extreme subwavelength scales. Recent advances in nanotechnology now enable the fabrication of films with nanometer-scale thickness, which can potentially be used to further miniaturize the next generation of electronic and photonic devices. Nowadays, there exist many kinds of materials that can be structured into thin films. Noble metals (Cu, Ag, Au, ...) are a particularly interesting class of material for nanotechnology due to their appealing chemical and physical properties. However, in very small metallic structures, quantum mechanical effects play an important role in the dynamics of electrons and their interaction with external electromagnetic fields (light). These effects can become even more significant when dealing with nonlinear optical phenomena, which necessitate extremely intense optical fields. Here we investigate the linear and nonlinear optical response of thin metallic films consisting of a finite number of atomically-thin layers by adopting a quantum-mechanical description of the electron dynamics in the atomic planes of the metal layers. We consider films of noble metals characterized by a potential that captures important electronic band features, including the atomic periodicity across the films, electron spill-out, and surface states, all of which contribute significantly to the optical response associated with plasmon resonances. Self-consistent field calculations of the optical response are performed by solving the single-electron density matrix equation of motion perturbatively, which yields the linear optical response, while non-perturbative simulations in the time-domain enable study of extreme nonlinear optical phenomena, including saturable absorption and high-order harmonic generation. We identify a strong dependence on quantum-finite size effects in the optical response associated with plasmon resonances, both in the linear and nonlinear domains.

Proceedings Article | 17 September 2018 Presentation

Metamaterials based on graphene and other atomic-scale systems (Conference Presentation)

F. Javier García de Abajo

Proceedings Volume 10719, 107190O (2018) https://doi.org/10.1117/12.2324292

KEYWORDS: Metamaterials, Graphene, Plasmons, Electrons, Ultrafast phenomena, Nonlinear response, Nonlinear optics, Quantum optics

Read Abstract +

Proceedings Article | 17 September 2018 Presentation

Analytical modeling of graphene plasmons (Conference Presentation)

Renwen Yu, Joel Cox, José Ramón Martínez Saavedra, Javier García de Abajo

Proceedings Volume 10721, 107210M (2018) https://doi.org/10.1117/12.2320131

KEYWORDS: Graphene, Plasmons, Plasmonics, Transparency, Dielectrics, Environmental sensing

Read Abstract +

Proceedings Article | 23 May 2018 Presentation

Plasmon-assisted high-harmonic generation in graphene (Conference Presentation)

Joel Cox, Andrea Marini, Javier Garcia de Abajo

Proceedings Volume 10672, 1067214 (2018) https://doi.org/10.1117/12.2306825

KEYWORDS: Graphene, Plasmons, Nanostructures, Ultraviolet radiation, Ultrafast phenomena, Light sources, Plasmonics, Near field, Electromagnetism, Solid state electronics

Read Abstract +

High-harmonic generation (HHG) in condensed-matter systems is both a source of fundamental insight into quantum electron motion and a promising candidate to realize compact ultraviolet and ultrafast light sources [1-3]. Here we argue that the large light intensity required for this phenomenon to occur can be reached by exploiting localized plasmons in conducting nanostructures. In particular, we demonstrate that doped graphene nanostructures combine a strong plasmonic near-field enhancement and a pronounced intrinsic nonlinearity that result in efficient broadband HHG within a single material platform [4]. We extract this conclusion from time-domain simulations using two complementary nonperturbative approaches based on atomistic one-electron density matrix and massless Dirac-fermion Bloch-equation pictures, where the latter treatment is supplemented by a classical electromagnetic description of the self-consistent field produced by the illuminated nanostructure. High harmonics are predicted to be emitted with unprecedentedly large intensity by tuning the incident light to the localized plasmons of ribbons and finite islands. In contrast to atomic systems, we observe no cutoff in harmonic order, while a comparison of the predicted HHG from graphene to that observed in solid-state systems suggests that the HHG yields measured in semiconductors can be produced by graphene plasmons using 3-4 orders of magnitude lower pulse fluence. Our results support the strong potential of nanostructured graphene as a robust, electrically-tunable platform for HHG. [1] S. Ghimire et al., “Observation of High-Order Harmonic Generation in a Bulk Crystal,” Nat. Phys. 7, 138 (2011). [2] O. Schubert et al., “Sub-Cycle Control of Terahertz High-Harmonic Generation by Dynamical Bloch Oscillations,” Nat. Photon. 8, 119 (2014). [3] T. T. Luu et al., “Extreme Ultraviolet High-Harmonic Spectroscopy of Solids,” Nature 521, 498 (2015). [4] J. D. Cox, A. Marini, and F. J. García de Abajo, “Plasmon-Assisted High-Harmonic Generation in Graphene,” Nat. Commun. 8, 14380 (2017).

Proceedings Article | 23 May 2018 Presentation

Plasmon generation through electron tunneling in graphene (Conference Presentation)

Sandra de Vega, F. Javier García de Abajo

Proceedings Volume 10672, 106721Q (2018) https://doi.org/10.1117/12.2309974

KEYWORDS: Plasmons, Graphene, Optoelectronics, Plasmonics

Read Abstract +

Proceedings Article | 23 May 2018 Presentation

Theoretical modelling of the saturable absorption of graphene (Conference Presentation)

Andrea Marini, Joel Cox, F. Javier García de Abajo

Proceedings Volume 10672, 1067216 (2018) https://doi.org/10.1117/12.2306923

KEYWORDS: Graphene, Saturable absorption, Modeling, Absorption, Doping, Mirrors, Fiber lasers, Random lasers, Nonlinear optics, Quenching (fluorescence)

Read Abstract +

Saturable absorption (SA) is an extreme nonlinear phenomenon that consists of the quenching of optical absorption under high-intensity illumination. This effect, which is an inherent property of photonic materials, constitutes a key element for passive mode-locking (PML) in laser cavities, where continuous waves are broken into a train of ultrashort optical pulses. Most materials undergo SA at very high optical intensities, in close proximity to their optical damage threshold. Currently, state-of-the-art semiconductor-based SA mirrors are routinely employed for PML lasers. However, these mirrors operate in a narrow spectral range, are poorly tunable, and require advanced fabrication techniques. Recently, carbon nanomaterials have emerged as an attractive, viable, and cost-effective alternative for the development of next-generation PML lasers. For example, carbon nanotubes undergo SA at rather modest light intensities, while their operation wavelength (determined by the energy band gap) can be manipulated by tuning their diameter. Broadband operation has been demonstrated by using an ensemble of CNTs with a wide distribution in diameter, at the expense of higher linear loss from off-resonance tubes. Graphene overcomes this limitation thanks to its peculiar conical band structure, which gives rise to broadband resonant SA at remarkably low light intensity that can further be tuned by means of an externally applied gate voltage. Graphene-based SA components have been used to achieve PML ultrafast laser operation, broadband tunability, and quality-factor switching. Graphene multilayers have also been employed to generate large energy pulses and to achieve PML in fiber lasers with normal dispersion. In addition, recent theoretical investigations predict single-mode operation of random lasers by embedding graphene flakes in a gain medium. Here we calculate intraband and interband contributions to SA of extended graphene by nonperturbatively and semianalytically solving the single-particle Dirac equation for massless Dirac fermions (MDFs) in the presence of an external electromagnetic field retaining only one-photon processes. We further investigate the dependence of the intensity-saturated grapheme conductivity on doping, temperature, and optical frequency. Interestingly, we find a remarkably low intensity threshold for SA, which is consistent with available experimental reports. Our calculations indicate a strong quenching of absorption depth produced by electrical doping (which can be controlled through gating), as well as a weak dependence on electron temperature. Additionally, through time-domain simulations based on an atomistic tight-binding/single-particle density-matrix formalism, we study SA in graphene nanoribbons, including finite-size effects and electron-electron interactions that play a significant role in the optical response of nanostructured graphene. Surprisingly, we find that while the linear absorption predicted in atomistic simulations is reduced compared to that of extended graphene, its nonlinear saturation intensity threshold is in good quantitative agreement with predictions based on the MDF model. Deviations from the semianalytical treatment occur only at high doping, where SA is quenched and multiphoton processes lead to an intensity-dependent increase of absorption. We anticipate that the present findings will impact the future development of graphene-based PML fibre lasers and single-mode random lasers.

Proceedings Article | 19 October 2017 Presentation

Nonlinear plasmonic sensing with nanographene (Conference Presentation)

Renwen Yu, Joel Cox, Javier García de Abajo

Proceedings Volume 10346, 103461Q (2017) https://doi.org/10.1117/12.2273418

KEYWORDS: Molecules, Graphene, Plasmonics, Plasmons, Molecular interactions, Dielectrics, Environmental sensing, Plasmonic sensors, Metals, Absorption

Read Abstract +

Proceedings Article | 19 October 2017 Presentation

Extreme nonlinear plasmonic phenomena in nanostructured graphene (Conference Presentation)

Joel Cox, Andrea Marini, F. Javier García de Abajo

Proceedings Volume 10346, 103461R (2017) https://doi.org/10.1117/12.2273886

KEYWORDS: Graphene, Plasmonics, Nanostructuring, Plasmons, Nonlinear optics, Nanostructures, Near field, Near field optics, Solid state physics, Ultraviolet radiation

Read Abstract +

Proceedings Article | 19 October 2017 Presentation

Ultrafast radiative heat transfer (Conference Presentation)

Renwen Yu, Alejandro Manjavacas, Javier García de Abajo

Proceedings Volume 10345, 103450X (2017) https://doi.org/10.1117/12.2273415

KEYWORDS: Graphene, Ultrafast phenomena, Radiative energy transfer, Plasmonics, Absorption, Electrons, Phonons, Picosecond phenomena, Diffusion, Thermography

Read Abstract +

Proceedings Article | 29 September 2017 Presentation

Instantaneous and transient nonlinearities of graphene plasmons (Conference Presentation)

Joel Cox, Javier García de Abajo

Proceedings Volume 10345, 1034516 (2017) https://doi.org/10.1117/12.2273932

KEYWORDS: Graphene, Plasmons, Plasmonics, Nonlinear response, Nanostructures, Harmonic generation, Nanophotonics, Nanostructuring, Transient nonlinear optics, Nonlinear optics

Read Abstract +

Proceedings Article | 29 September 2017 Presentation

Quantum phenomena with graphene plasmons (Conference Presentation)

Javier García de Abajo

Proceedings Volume 10359, 103590Q (2017) https://doi.org/10.1117/12.2274733

KEYWORDS: Graphene, Plasmons, Plasmonics, Quantum optics, Nanophotonics, Electrons, Ultrafast phenomena, Molecules, Molecular interactions, Metamaterials

Read Abstract +

Proceedings Article | 20 September 2017 Open Access

Controlling light at the atomic scale (Conference Presentation)

F. Javier García de Abajo

Proceedings Volume 10359, 1035902 (2017) https://doi.org/10.1117/12.2277843

Read Abstract +

Proceedings Article | 9 November 2016 Presentation

Hot-electron dynamics and thermalization in small metallic nanoparticles (Conference Presentation)

Javier Garcia de Abajo

Proceedings Volume 9918, 99180I (2016) https://doi.org/10.1117/12.2239545

KEYWORDS: Graphene, Plasmons, Electrons, Modulation, Nanoparticles, Crystals, Crystallography, Nanostructures, Near field, Mid-IR

Read Abstract +

Proceedings Article | 9 November 2016 Open Access

Recent advances in graphene Nanophotonics (Conference Presentation)

Javier García de Abajo

Proceedings Volume 9918, 991802 (2016) https://doi.org/10.1117/12.2239937

KEYWORDS: Quantum optics, Graphene, Plasmons, Physics, Nanophotonics, Metamaterials, Current controlled current source

Read Abstract +

Proceedings Article | 9 November 2016 Presentation

Nonlinear graphene plasmonics (Conference Presentation)

Joel Cox, Andrea Marini, Javier Garcia de Abajo

Proceedings Volume 9921, 99211J (2016) https://doi.org/10.1117/12.2237732

KEYWORDS: Graphene, Plasmonics, Plasmons, Nanophotonics, Nonlinear optics, Nanostructuring, Carbon, Nonlinear response, Saturable absorption, Mode locking

Read Abstract +

Proceedings Article | 8 November 2016 Presentation

Saturable absoprtion of graphene (Conference Presentation)

Andrea Marini, Joel Cox, Javier Garcia de Abajo

Proceedings Volume 9919, 99190Q (2016) https://doi.org/10.1117/12.2237745

KEYWORDS: Graphene, Saturable absorption, Absorption, Quenching (fluorescence), Mirrors, Optical components, Mode locking, Laser resonators, Continuous wave operation, Semiconductors

Read Abstract +

Proceedings Article | 3 November 2016 Presentation

Complete optical absorption of ultrashort pulses by plasmons in nanostructured graphene (Conference Presentation)

José Ramón Martínez Saavedra, Giulio Cerullo, Valerio Pruneri, Simon Wall, Javier García de Abajo

Proceedings Volume 9932, 99320L (2016) https://doi.org/10.1117/12.2237992

KEYWORDS: Graphene, Plasmons, Absorption, Ultrafast phenomena, Optoelectronics, Nanostructuring, Modulation, Mid-IR

Read Abstract +

The peculiar electronic structure of graphene results in a large optoelectronic response that holds great potential for technology. For example, this material exhibits a nearly constant absorption ~2.3% over a broad spectral range [1], which can be electrically modulated in the mid-IR by injecting attainable densities of charge carriers. When doped, graphene can sustain plasmons that radically modify its optical response, enabling complete optical absorption for suitably designed patterns [2]. Graphene nanoribbons constitute one of the simplest geometrical patterns that one can produce. They have been extensively studied and their plasmons accurately explained with simple models [3]. When heated to a large electronic temperature, graphene behaves nearly as if is was highly doped, also giving rise to plasmon modes [4]. In this work, we study the possibility of using ultrashort light pulses together with the natural electronic relaxation mechanisms in graphene nanoribbons as a way to tune their optical response. We first discuss the optically induced plasmons of individual nanoribbons when illuminated with ultrashort pulses and then analyze the evolution of the plasmon frequency as a function of the delay between pump and probe. We study the redshift of these plasmons with increasing delay due to electron relaxation. We also investigate the optical response of the ribbon exposed to a train of optical pulses. We further discuss ribbon arrays illuminated from the substrate under total internal reflection conditions, for which we predict complete absorption for a suitable choice of geometrical and illumination parameters. References [1] F. H. L. Koppens, D. E. Chang, and F. J. García de Abajo, Nano Letters 11, 3370-3377 (2011) [2] S. Thongrattanasiri, F. H. L. Koppens, and F. J. García de Abajo, Phys. Rev. Lett. 108, 047401 (2012) [3] I. Silveiro, J. M. Plaza Ortega, and F. J. García de Abajo, Light: Science and Applications 4, e241 (2015) [4] F. J. García de Abajo, ACS Photon. 1, 135 (2014).

Proceedings Article | 5 October 2015 Presentation

Infrared spectroscopy with tunable graphene plasmons (Presentation Recording)

Andrea Marini, Iván Silveiro, Javier Garcia de Abajo

Proceedings Volume 9544, 95440W (2015) https://doi.org/10.1117/12.2190264

KEYWORDS: Graphene, Plasmons, Infrared spectroscopy, Absorption, Raman scattering, Light scattering, Infrared sensors, Infrared radiation, Laser scattering, Scattering

Read Abstract +

Proceedings Article | 17 August 2014 Paper

Eigenvector expansion of discrete-dipole approximation: application to the simulation of optical extinction and electron energy-loss spectroscopies of coupled metallic nanoparticles (presentation video)

Stéphane-Olivier Guillaume, F. Javier Garcia de Abajo, Luc Henrard

Proceedings Volume 9163, 91631J (2014) https://doi.org/10.1117/12.2059576

KEYWORDS: Nanoparticles, Video, Optical simulations, Spectroscopy, Computing systems, Electron beams, Plasmonics, Nanostructures, Optical properties, Current controlled current source

Read Abstract +

Proceedings Article | 30 August 2006 Paper

Simulating electromagnetic response in coupled metallic nanoparticles for nanoscale optical microscopy and spectroscopy: nanorod-end effects

Garnett Bryant, Isabel Romero, F. Javier García de Abajo, Javier Aizpurua

Proceedings Volume 6323, 632313 (2006) https://doi.org/10.1117/12.680701

KEYWORDS: Near field, Near field optics, Spectroscopy, Nanoparticles, Gold, Antennas, Electromagnetism, Optical microscopy, Light scattering, Nanorods

Read Abstract +

Showing 5 of 73 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 10 December 2014

Plasmonics

Conference Committee Involvement (42)

Metamaterials XV

7 April 2025 | Prague, Czech Republic

Plasmonics VIII

12 October 2024 | Nantong, Jiangsu, China

Quantum Nanophotonic Materials, Devices, and Systems 2024

20 August 2024 | San Diego, California, United States

Metamaterials, Metadevices, and Metasystems 2024

18 August 2024 | San Diego, California, United States

Plasmonics VII

14 October 2023 | Beijing, China

Metamaterials, Metadevices, and Metasystems 2023

20 August 2023 | San Diego, California, United States

Metamaterials XIV

26 April 2023 | Prague, Czech Republic

Metamaterials, Metadevices, and Metasystems 2022

21 August 2022 | San Diego, California, United States

Plasmonics VI

10 October 2021 | Nantong, JS, China

Metamaterials, Metadevices, and Metasystems 2021

1 August 2021 | San Diego, California, United States

Metamaterials XIII

19 April 2021 | Online Only, Czech Republic

Plasmonics V

12 October 2020 | Online Only, China

Metamaterials, Metadevices, and Metasystems 2020

24 August 2020 | Online Only, California, United States

Advances in Ultrafast Condensed Phase Physics II

8 April 2020 | Online Only, France

Plasmonics IV

22 October 2019 | Hangzhou, China

Metamaterials, Metadevices, and Metasystems 2019

11 August 2019 | San Diego, California, United States

Metamaterials

3 April 2019 | Prague, Czech Republic

Plasmonics III

12 October 2018 | Beijing, China

Quantum Nanophotonics 2018

20 August 2018 | San Diego, California, United States

Metamaterials, Metadevices, and Metasystems 2018

19 August 2018 | San Diego, California, United States

Quantum Nanophotonics

7 August 2017 | San Diego, California, United States

Metamaterials, Metadevices, and Metasystems 2017

6 August 2017 | San Diego, California, United States

Plasmonics II

12 October 2016 | Beijing, China

Metamaterials

4 April 2016 | Brussels, Belgium

Plasmonics

9 October 2014 | Beijing, China

Metamaterials

14 April 2014 | Brussels, Belgium

Metamaterials: Fundamentals and Applications VI

25 August 2013 | San Diego, California, United States

Metamaterials VIII

17 April 2013 | Prague, Czech Republic

Metamaterials: Fundamentals and Applications V

12 August 2012 | San Diego, California, United States

Metamaterials

16 April 2012 | Brussels, Belgium

Metamaterials: Fundamentals and Applications IV

21 August 2011 | San Diego, California, United States

Metamaterials

20 April 2011 | Prague, Czech Republic

Metamaterials: Fundamentals and Applications III

1 August 2010 | San Diego, California, United States

Metamaterials: Fundamentals and Applications II

2 August 2009 | San Diego, California, United States

Metamaterials IV

20 April 2009 | Prague, Czech Republic

Metamaterials: Fundamentals and Applications

10 August 2008 | San Diego, California, United States

Photonic Metamaterials

26 August 2007 | San Diego, California, United States

Photonic Materials, Devices, and Applications

2 May 2007 | Maspalomas, Gran Canaria, Spain

Metamaterials

16 April 2007 | Prague, Czech Republic

Complex Photonic Media

13 August 2006 | San Diego, California, United States

Metamaterials

30 August 2005 | Warsaw, Poland

Photonic Materials, Devices, and Applications

9 May 2005 | Sevilla, Spain

Showing 5 of 42 Conference Committees

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Keywords/Phrases

Search In:

Publication Years