Dr. Tomasz J. Antosiewicz Profile

Dr. Tomasz J. Antosiewicz

Associate Professor at University of Warsaw

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Author

Publications (31)

Proceedings Article | 11 June 2024 Presentation

Modification of micro- and macroproperties of plasmon-molecule systems by strong coupling

Tomasz Antosiewicz, Maria Bancerek, Katarzyna Kluczyk-Korch

Proceedings Volume PC12991, PC129911C (2024) https://doi.org/10.1117/12.3022079

KEYWORDS: Nanoparticles, Absorption, Oscillators, Molecules, Localized surface plasmon resonances, Electric fields, Systems modeling, Resonators, Quenching, Plasmonics

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Proceedings Article | 24 May 2022 Presentation + Paper

Chirality enhancement in substrate supported nanostructures

Krzysztof Czajkowski, Tomasz Antosiewicz

Proceedings Volume 12130, 1213005 (2022) https://doi.org/10.1117/12.2624378

KEYWORDS: Particles, Dichroic materials, Molecules, Scattering, Nanostructures, Optical spheres, Light scattering, Refractive index, Absorption, Multiple scattering

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Proceedings Article | 24 May 2022 Poster + Presentation + Paper

Optical properties of hyperbolic nanoresonators

Maria Bancerek, Krzysztof Czajkowski, A. Korneluk, D. Świtlik, Tomasz Antosiewicz

Proceedings Volume 12130, 121300K (2022) https://doi.org/10.1117/12.2624422

KEYWORDS: Magnetism, Optical properties, Metals, Resonators, Polarization, Dispersion, Metamaterials, Energy efficiency, Dielectrics

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Hyperbolic metamaterials (HMMs) gained a lot of interest amongst researchers in recent years due to their novel properties stemming from hyperbolic dispersion, such as anomalous scattering, subwavelength confinement of light or enhancing far-field radiation. In our work, we investigate optical properties of nanostructured HMMs in a form of spherical nanoresonators composed of stacked alternating metal-dielectric layers, which is one way to realize hyperbolic dispersion. Using T-matrix analysis, combined with a quasistatic approach, we explore their unique spectral response to unravel fundamental electromagnetic properties of hyperbolic nanoresonators. The modal structure of hyperbolic nanospheres (HNSs) is richer than those of conventional nanoantennas and can be tuned either with material properties or incident light conditions. We show that, depending on the direction and polarization of incident light, such nanoresonators can exhibit a plasmonic-like response or one with an atypical modal order, with electric and magnetic modes of higher orders appearing at energies below those of lower order modes. We underline how constructive or destructive cross coupling between various electric and magnetic multipoles, determined by the hyperbolic dispersion, influences the overall optical response and enables phenomena absent in the isotropic medium. Such an example is a negative contribution of a given mode to the extinction cross-section, stemming from destructive cross coupling and is an indicator of energy transfer between modes. We show how mode cross coupling (and thus HNS optical properties) change with material properties – varying the metal fill-factor allows for significant tunability from a uniaxial dielectric through a type I or II hyperbolic material to a uniaxial metal. By applying the quasistatic approach we also analyse the origin of the dipolar modes and obtain material-dependent resonance conditions for both electric and magnetic mode. Furthermore, we conclude that magnetic dipolar resonance presence is determined by the hyperbolic disperison, i.e. opposite signs of the ordinary and extraordinary permittivities.

Proceedings Article | 1 August 2021 Poster

Abundance of cavity-free polaritons in resonant materials and nanostructures

Adriana Canales, Denis Baranov, Tomasz Antosiewicz, Timur Shegai

Proceedings Volume 11795, 1179528 (2021) https://doi.org/10.1117/12.2594098

KEYWORDS: Polaritons, Nanostructures, Chemical reactions, Spherical lenses, Perovskite, Optical resonators, Optical microcavities, Nanowires, Nanostructuring, Molecules

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Proceedings Article | 18 April 2021 Presentation + Paper

Substrate-supported dielectric arrays for refractometric sensing purposes

Maria Bancerek, Krzysztof Czajkowski, Olga Kochanowska, Tomasz Antosiewicz

Proceedings Volume 11769, 117690D (2021) https://doi.org/10.1117/12.2592434

KEYWORDS: Dielectrics, Silicon, Magnetism, Refractive index, Particles, Optical components, Nanophotonics, Nanoantennas, Multiple scattering, Electromagnetic coupling

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Proceedings Article | 18 April 2021 Presentation + Paper

Far-field optical properties of disordered dielectric nanoparticle arrays within T-matrix framework

Krzysztof Czajkowski, Maria Bancerek, T. Antosiewicz

Proceedings Volume 11769, 1176905 (2021) https://doi.org/10.1117/12.2591853

KEYWORDS: Nanoparticles, Optical properties, Dielectrics, Multiple scattering, Light scattering, Scattering, Photovoltaics

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Proceedings Article | 30 April 2019 Presentation + Paper

Subwavelength confinement of light in hyperbolic metamaterials with dielectric nanoparticle coupling

Krzysztof Czajkowski, Maria Bancerek, Tomasz Antosiewicz, Rafał Kotyński

Proceedings Volume 11025, 110250D (2019) https://doi.org/10.1117/12.2522771

KEYWORDS: Computational imaging, Super resolution, Metamaterials, Nanoparticles, Dielectrics, Interfaces, Metals, Light wave propagation, Diffraction, Dispersion

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Proceedings Article | 30 April 2019 Presentation + Paper

Electric and magnetic dipole and quadrupole coupling in an effective medium description of amorphous arrays of optical nanoresonators

Krzysztof Czajkowski, Tomasz Antosiewicz

Proceedings Volume 11025, 110250S (2019) https://doi.org/10.1117/12.2522773

KEYWORDS: Nanoparticles, Magnetism, Refractive index, Polarizability, Particles, Mie scattering, Plasmonics, Silicon, Silver, Disordered photonic crystals

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The optical properties of spherical nanoparticles are described by Mie theory which yields their multipole electric and magnetic resonances. Their characteristics (and presence) depend on nanoparticle size and material. For sufficiently small metallic nanoparticles the response is determined by the electric dipolar polarizability in the small particle limit. However, as the size increases, higher order electric multipoles have to be accounted for. Although, not particularly strong, the magnetic response of metallic nanoparticles can also lead to significant optical effects when the nanoparticle is placed in an array. It is, however, significantly stronger in dielectric nanoparticles due to circular displacement current of the electric field. The orientation of the induced magnetic dipole is perpendicular to that of the corresponding electric dipole. As in the case of metallic nanoparticles higher order multipoles have to be considered. This work focuses on amorphous arrays of nanoparticles in which the nanoparticles are placed randomly using a random sequential adsorption algorithm (RSA) with the condition that a minimum center-to-center distance (lcc) between the nanoparticles is present, lcc=CCxD, where D is the nanoparticle diameter and CC is a dimensionless parameter. For simplicity it is assumed that all the nanoparticles have the same diameter. Building upon previous work, we develop a framework in which a localized optical mode of an amorphous array of discrete nanoparticles is self-consistently calculated by assuming that, on average, the nanoparticle is excited by the same field consisting of the incident field and the average scattered field from all the other particles in the system. In this work, this approach is extended to include higher order modes as well as those of the magnetic character. First, the extinction cross-section spectra for dielectric spherical nanoparticles are analyzed as a function of size in terms of contributions from various multipoles. Then, the effective medium description of amorphous arrays of nanoparticles is presented and supported by numerical calculations with T-Matrix method.

Proceedings Article | 19 April 2016 Paper

Sensing (un)binding events via surface plasmons: effects of resonator geometry

Tomasz Antosiewicz, Virginia Claudio, Mikael Käll

Proceedings Volume 9884, 98842F (2016) https://doi.org/10.1117/12.2227119

KEYWORDS: Molecules, Sensors, Surface plasmons, Resonators, Plasmonics, Plasmons, Stochastic processes, Electromagnetism, Biosensing, Metals, Plasmonic sensors, Receptors, Nanosensors

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The resonance conditions of localized surface plasmon resonances (LSPRs) can be perturbed in any number ways making plasmon nanoresonators viable tools in detection of e.g. phase changes, pH, gasses, and single molecules. Precise measurement via LSPR of molecular concentrations hinge on the ability to confidently count the number of molecules attached to a metal resonator and ideally to track binding and unbinding events in real-time. These two requirements make it necessary to rigorously quantify relations between the number of bound molecules and response of plasmonic sensors. This endeavor is hindered on the one hand by a spatially varying response of a given plasmonic nanosensor. On the other hand movement of molecules is determined by stochastic effects (Brownian motion) as well as deterministic flow, if present, in microfluidic channels. The combination of molecular dynamics and the electromagnetic response of the LSPR yield an uncertainty which is little understood and whose effect is often disregarded in quantitative sensing experiments. Using a combination of electromagnetic finite-difference time-domain (FDTD) calculations of the plasmon resonance peak shift of various metal nanosensors (disk, cone, rod, dimer) and stochastic diffusion-reaction simulations of biomolecular interactions on a sensor surface we clarify the interplay between position dependent binding probability and inhomogeneous sensitivity distribution. We show, how the statistical characteristics of the total signal upon molecular binding are determined. The proposed methodology is, in general, applicable to any sensor and any transduction mechanism, although the specifics of implementation will vary depending on circumstances. In this work we focus on elucidating how the interplay between electromagnetic and stochastic effects impacts the feasibility of employing particular shapes of plasmonic sensors for real-time monitoring of individual binding reactions or sensing low concentrations – which characteristics make a given sensor optimal for a given task. We also address the issue of how particular illumination conditions affect the level of uncertainty of the measured signal upon molecular binding.

Proceedings Article | 6 May 2015 Paper

Perfectly matched layer based multilayer absorbers

Tomasz Stefaniuk, Marcin Stolarek, Anna Pastuszczak, Piotr Wróbel, Bartosz Wieciech, Tomasz Antosiewicz, Rafał Kotyński

Proceedings Volume 9502, 95020F (2015) https://doi.org/10.1117/12.2181875

KEYWORDS: Absorbance, Polarization, Genetic algorithms, Metamaterials, Absorption, Magnetism, Optimization (mathematics), Electromagnetism, Multilayers, Electron beams

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Proceedings Article | 5 May 2015 Paper

Enhancement of light absorption in polyazomethines due to plasmon excitation on randomly distributed metal nanoparticles

P. Wróbel, T. Antosiewicz, T. Stefaniuk, A. Ciesielski, A. Iwan, A. Wronkowska, A. Wronkowski, T. Szoplik

Proceedings Volume 9502, 95020C (2015) https://doi.org/10.1117/12.2180252

KEYWORDS: Absorption, Aluminum, Polymers, Nanoparticles, Silver, Metals, Solar cells, Scattering, Refractive index, Finite-difference time-domain method

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In photovoltaic devices, metal nanoparticles embedded in a semiconductor layer allow the enhancement of solar-toelectric energy conversion efficiency due to enhanced light absorption via a prolonged optical path, enhanced electric fields near the metallic inclusions, direct injection of hot electrons, or local heating. Here we pursue the first two avenues. In the first, light scattered at an angle beyond the critical angle for reflection is coupled into the semiconductor layer and confined within such planar waveguide up to possible exciton generation. In the second, light is trapped by the excitation of localized surface plasmons on metal nanoparticles leading to enhanced near-field plasmon-exciton coupling at the peak of the plasmon resonance. We report on results of a numerical experiment on light absorption in polymer- (fullerene derivative) blends, using the 3D FDTD method, where exact optical parameters of the materials involved are taken from our recent measurements. In simulations we investigate light absorption in randomly distributed metal nanoparticles dispersed in polyazomethine-(fullerene derivative) blends, which serve as active layers in bulkheterojunction polymer solar cells. In the study Ag and Al nanoparticles of different diameters and fill factors are diffused in two air-stable aromatic polyazomethines with different chemical structures (abbreviated S9POF and S15POF) mixed with phenyl-C₆₁-butyric acid methyl ester (PCBM) or [6,6]-phenyl-C₇₁-butyric acid methyl ester (PC₇₁BM). The mixtures are spin coated on a 100 nm thick Al layer deposited on a fused silica substrate. Optical constants of the active layers are taken from spectroscopic ellipsometry and reflectance measurements using a rotating analyzer type ellipsometer with auto-retarder performed in the wavelength range from 225 nm to 2200 nm. The permittivities of Ag and Al particles of diameters from 20 to 60 nm are assumed to be equal to those measured on 100 to 200 nm thick metal films.

Proceedings Article | 5 May 2015 Paper

Optical activity of catalytic elements of hetero-metallic nanostructures

Tomasz Antosiewicz, S. Peter Apell, Carl Wadell, Christoph Langhammer

Proceedings Volume 9502, 95020D (2015) https://doi.org/10.1117/12.2180045

KEYWORDS: Absorption, Silver, Palladium, Nanoparticles, Metals, Nanostructures, Ruthenium, Rhodium, Particles, Plasmonics

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Proceedings Article | 5 December 2014 Paper

On the optical properties of plasmonic glasses

Tomasz Antosiewicz, Christoph Langhammer, S. Peter Apell

Proceedings Volume 9441, 94411G (2014) https://doi.org/10.1117/12.2176056

KEYWORDS: Plasmonics, Glasses, Optical properties, Optical spheres, Particles, Electroluminescent displays, Composites, Correlation function, Metals, Polarizability

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Proceedings Article | 1 May 2012 Paper

Concentrator of magnetic field of light

Piotr Wróbel, Tomasz Stefaniuk, Tomasz Antosiewicz, Tomasz Szoplik

Proceedings Volume 8423, 84231T (2012) https://doi.org/10.1117/12.922912

KEYWORDS: Magnetism, Metals, Near field scanning optical microscopy, Dielectrics, Silver, Metamaterials, Aluminum, Solar concentrators, Near field, Coating

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Proceedings Article | 19 May 2011 Paper

Bi-metal coated aperture SNOM probes

Tomasz Antosiewicz, Piotr Wróbel, Tomasz Szoplik

Proceedings Volume 8070, 80700Z (2011) https://doi.org/10.1117/12.886834

KEYWORDS: Metals, Aluminum, Near field scanning optical microscopy, Copper, Coating, Gold, Silver, Skin, Interfaces, Plasmons

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Proceedings Article | 18 May 2011 Paper

Optimization of transmission and focusing properties of plasmonic nanolenses

P. Wróbel, T. Antosiewicz, T. Szoplik

Proceedings Volume 8070, 80700G (2011) https://doi.org/10.1117/12.886838

KEYWORDS: Dielectrics, Metals, Plasmonics, Refractive index, Lenses, Silver, Plasmons, Constructive interference, Free space, Wave propagation

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Proceedings Article | 18 May 2011 Paper

Magnetic probe for material characterization at optical frequencies

Tomasz Antosiewicz, Piotr Wróbel, Tomasz Szoplik

Proceedings Volume 8070, 80700E (2011) https://doi.org/10.1117/12.886828

KEYWORDS: Magnetism, Near field optics, Metamaterials, Silver, Metals, Plasmons, Dielectrics, Near field scanning optical microscopy, Plasmonics, Near field

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Proceedings Article | 18 May 2011 Paper

Fabrication of corrugated probes for scanning near-field optical microscopy

Piotr Wróbel, Tomasz Stefaniuk, Tomasz Antosiewicz, Adam Libura, Grzegorz Nowak, Tomasz Wejrzanowski, Robert Slesinski, Kazimierz Jedrzejewski, Tomasz Szoplik

Proceedings Volume 8070, 80700I (2011) https://doi.org/10.1117/12.886844

KEYWORDS: Near field scanning optical microscopy, Fiber Bragg gratings, Etching, Refractive index, Scanning electron microscopy, Silica, Ultraviolet radiation, Interfaces, Coating, Optical microscopy

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Proceedings Article | 15 December 2010 Paper

Plasmonic nanolenses made of noble metals focusing into far-field

P. Wróbel, T. Antosiewicz, T. Szoplik

Proceedings Volume 7746, 77461B (2010) https://doi.org/10.1117/12.883838

KEYWORDS: Silver, Metals, Aluminum, Gold, Copper, Plasmonics, Dielectrics, Cladding, Optical fibers, Absorption

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Proceedings Article | 15 December 2010 Paper

Performance of SNOM probes with one groove at core: cladding interface

Tomasz Antosiewicz, Piotr Wróbel, Tomasz Szoplik

Proceedings Volume 7746, 77460Z (2010) https://doi.org/10.1117/12.882789

KEYWORDS: Aluminum, Gold, Metals, Copper, Coating, Near field scanning optical microscopy, Plasmons, Cladding, Interfaces, Finite-difference time-domain method

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Proceedings Article | 29 April 2010 Paper

Optimisation of a plasmonic nanolens: increase of transmission and focal length

Piotr Wróbel, Tomasz Antosiewicz, Tomasz Szoplik

Proceedings Volume 7711, 77110I (2010) https://doi.org/10.1117/12.855511

KEYWORDS: Lenses, Metals, Plasmonics, Silver, Finite-difference time-domain method, Plasmons, Dielectrics, Waveguides, Diffraction, Cladding

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Proceedings Article | 31 December 2009 Paper

Super-resolving metallo-dielectric flat lens

Rafal Kotyński, Tomasz Stefaniuk, Piotr Wróbel, Tomasz Antosiewicz, Tomasz Szoplik

Proceedings Volume 7388, 73880T (2009) https://doi.org/10.1117/12.853071

KEYWORDS: Silver, Point spread functions, Dielectrics, Wave propagation, Polarization, Near field optics, Plasmonics, Diffraction, Super resolution, Metals

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Proceedings Article | 12 May 2009 Paper

Focusing of radially polarized light with corrugated silver nanolayer

Piotr Wrobel, Jacek Pniewski, Tomasz Antosiewicz, Tomasz Szoplik

Proceedings Volume 7353, 73530X (2009) https://doi.org/10.1117/12.821371

KEYWORDS: Silver, Plasmons, Metals, Polarization, Wave propagation, Surface plasmons, Finite-difference time-domain method, Erbium, Near field optics, Nano optics

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Proceedings Article | 12 May 2009 Paper

Dielectric-metal-dielectric nanotip for SNOM

Tomasz Antosiewicz, Piotr Wróbel, Tomasz Szoplik

Proceedings Volume 7353, 73530I (2009) https://doi.org/10.1117/12.827499

KEYWORDS: Dielectrics, Near field scanning optical microscopy, Silver, Metals, Plasmons, Coating, Refractive index, Finite-difference time-domain method, Cladding, Interfaces

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Proceedings Article | 20 November 2008 Paper

High resolution SNOM probes

Tomasz Antosiewicz, Piotr Wróbel, Tomasz Szoplik

Proceedings Volume 7141, 71411I (2008) https://doi.org/10.1117/12.822399

KEYWORDS: Near field scanning optical microscopy, Aluminum, Silver, Metals, Coating, Skin, Interfaces, Plasmons, Dielectrics, Refractive index

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Proceedings Article | 6 May 2008 Paper

Enhanced energy throughput in corrugated tapered metal-coated SNOM probes

T. Antosiewicz, T. Szoplik

Proceedings Volume 6987, 698705 (2008) https://doi.org/10.1117/12.785223

KEYWORDS: Near field scanning optical microscopy, Interfaces, Coating, Metals, Dielectrics, Silver, Image resolution, Point spread functions, Superlenses, Surface plasmons

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Proceedings Article | 22 April 2008 Paper

Beam shaping with nanooptical devices

Jacek Pniewski, Tomasz Antosiewicz, Wladyslaw Saj, Tomasz Szoplik

Proceedings Volume 7008, 70081K (2008) https://doi.org/10.1117/12.797099

KEYWORDS: Waveguides, Near field scanning optical microscopy, Metals, Light wave propagation, Surface plasmons, Plasmons, Silver, Beam shaping, Radio propagation, Interfaces

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Proceedings Article | 6 December 2006 Paper

Metamaterials: composite materials with unnatural electromagnetic properties

Jacek Pniewski, W. Saj, Tomasz Antosiewicz, Tomasz Szoplik

Proceedings Volume 5945, 59451N (2006) https://doi.org/10.1117/12.639045

KEYWORDS: Composites, Metals, Photonic crystals, Waveguides, Negative refraction, Magnetism, Radio propagation, Electromagnetism, Dielectrics, Electromagnetic radiation

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Proceedings Article | 14 June 2006 Paper

Numerical investigation of energy transport along chains of silver nanorods and nanoplates

J. Pniewski, W. Saj, T. Antosiewicz, T. Szoplik

Proceedings Volume 6254, 62540R (2006) https://doi.org/10.1117/12.679925

KEYWORDS: Waveguides, Signal attenuation, Silver, Plasmons, Radio propagation, Metals, Dielectrics, Electrons, Gaussian beams, Nanorods

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Proceedings Article | 20 April 2006 Paper

Plasmon waveguides on silver nanoelements

W. Saj, Tomasz Antosiewicz, Jacek Pniewski, Tomasz Szoplik

Proceedings Volume 6195, 61950Y (2006) https://doi.org/10.1117/12.662932

KEYWORDS: Waveguides, Plasmons, Metals, Light wave propagation, Refractive index, Silver, Dielectrics, Gaussian beams, Finite-difference time-domain method, Signal attenuation

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Proceedings Article | 28 September 2005 Paper

Simulation of resonant behavior and negative refraction of metal nanowire composites

T. Antosiewicz, W. Saj, J. Pniewski, T. Szoplik

Proceedings Volume 5955, 59550G (2005) https://doi.org/10.1117/12.626027

KEYWORDS: Metamaterials, Signal attenuation, Negative refraction, Plasmons, Magnetism, Gaussian beams, Phase shifts, Terahertz radiation, Finite-difference time-domain method, Nanowires

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A metal-in-dielectric metamaterial structure different from that composed of split-ring-resonators and wire units was proposed. The metamaterial layer is composed of randomly distributed parallel pairs of nanowires of subwavelength size that form electromagnetically active units. It was predicted that the metamaterial should exhibit macroscopic negative refraction. In a recent paper fabrication of the metamaterial in the form of periodic array of parallel golden nanorods with trapezoidal cross section was reported and a negative refractive index of n = -0.3 was observed at a wavelength 1.5 μm (200 THz). In this paper we simulate response of a single pair of nanowires to near-infrared illumination and observe surface plasmon resonances using FDTD method. We simulate light propagation through the metamaterial slab made of one, two and three layers. In each layer the nanowires cover 10% of the surface. In simulations made for a single layer medium, negative refraction is observed for wavelengths from 1.55 to 2.1 μm, with Δλ/λ ≈ 0.3. When the number of layers increases, the range of negatively refracted wavelengths becomes narrower. For a narrow range of wavelengths that are close to the resonant frequency the intensity transmission of three layers reaches −7dB for the angle of incidence of 10°. Then layers with two orientations of nanowires are considered. In the first stack of layers all nanowires are oriented in parallel. This configuration assures plasmon resonances for both the electric and magnetic components of electromagnetic wave in all layers. In the second stack, nanowires in two subsequent layers are oriented perpendicularly. In the second layer, the plasmon resonance for the electric component of light is due to the oblique incidence of light. For a small angle of incidence of a near infrared narrow Gaussian beam we calculate two characteristics: the attenuation vs. wavelength and the lateral shift of the beam on the plane-parallel slab vs. wavelength. For a narrow range of wavelengths simulations show negative refraction of a beam incident the plane of the nanowires and a corresponding shift in the far field.

Showing 5 of 31 publications

Conference Committee Involvement (3)

Metamaterials XV

7 April 2025 | Prague, Czech Republic

Metamaterials XIV

26 April 2023 | Prague, Czech Republic

Metamaterials XIII

19 April 2021 | Online Only, Czech Republic

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