Prof. Giuseppe Strangi Profile

Prof. Giuseppe Strangi

Professor at Case Western Reserve Univ

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Publications (9)

Proceedings Article | 1 August 2021 Presentation

Magneto-optics in hyperbolic nanomaterials

Joel Kuttruff, Alessio Gabbani, Gaia Petrucci, Yingqi Zhao, Marzia Iarossi, Esteban Pedrueza Villalmanzo, Antonietta Parracino, Giuseppe Strangi, Alexandre Dmitriev, Francesco De Angelis, Daniele Brida, Francesco Pineider, Nicolò Maccaferri

Proceedings Volume 11805, 1180522 (2021) https://doi.org/10.1117/12.2595139

KEYWORDS: Magneto-optics, Magnetism, Nanomaterials, Nanoantennas, Dichroic materials, Visible radiation, Systems modeling, Spherical lenses, Particles, Numerical simulations

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Proceedings Article | 18 April 2021 Presentation

Broadband tuning of the magneto-optical response of hybrid metal-insulator nanoparticles enabled by hyperbolic electric and magnetic modes

Joel Kuttruff, Alessio Gabbani, Gaia Petrucci, Yingqi Zhao, Marzia Iarossi, Esteban Pedrueza Villalmanzo, Antonietta Parracino, Giuseppe Strangi, Alexandre Dmitriev, Daniele Brida, Francesco De Angelis, Francesco Pineider, Nicolò Maccaferri

Proceedings Volume 11769, 117690H (2021) https://doi.org/10.1117/12.2589837

KEYWORDS: Magnetism, Nanoparticles, Magneto-optics, Circular dichroism spectroscopy, Optical properties, Metals, Visible radiation, Systems modeling, Surface plasmons, Spherical lenses

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In the framework of magneto-photonics, the optical properties of a material can controlled by an external magnetic field, providing active functionalities for applications, such as sensing and nonreciprocal optical isolation. For noble metals in particular, the inherently weak magnetooptical coupling of the bulk material can be greatly enhanced via excitation of localized surface plasmons (LSP) in nanostructured samples. Hyperbolic metamaterials therein provide the ideal platform to tune the plasmonic properties via careful design of the effective permittivity tensor. Here, we report on the magnetic circular dichroism of electric and magnetic dipole modes of a type II hyperbolic metasurface. Disk-shaped nanoparticles consist in stacks of alternating dielectric and metallic layers. Using an effective medium theory, we show that the optical properties of the system can be perfectly described by an anisotropic homogenized permittivity. Magnetic circular dichroism spectroscopy experiments are compared with plain gold disk samples and reveal a broadband magneto-optical response across the visible and near infrared spectral range. In particular, derivative-like spectral signatures at the resonances of the nanoparticles prove the induced dichroism for the two modes of the system. Results are interpreted in terms of magnetically induced spatial confinement/broadening of circular currents in the nanoparticles and are compared with a comprehensive numerical model based on the finite elements method using the real dimensions of the nanostructure. Spherical particles are employed as an analytical model system, allowing to generalize the contribution of electric and magnetic modes to the total magneto-optical response. More in detail, interaction cross sections are calculated as a weighted sum of the corresponding Mie coefficients. Utilizing a perturbative approach, we describe the magneto-optical effect in terms of linear changes in the cyclotron frequency of free charge carriers in the metal. By comparing our analytical model with full-wave numerical results, we can identify the contribution of electric and magnetic dipole modes to the spectrum and reproduce the spectral line shape we observe in the experiments for the hyperbolic nanoparticles.

Proceedings Article | 1 April 2020 Presentation + Paper

Generalized Brewster effect in aluminum-doped ZnO nanopillars

Sharmistha Chatterjee, Evgeniy Shkondin, Osamu Takayama, Andrei Lavrinenko, Michael Hinczewski, Giuseppe Strangi

Proceedings Volume 11345, 1134524 (2020) https://doi.org/10.1117/12.2554559

KEYWORDS: Reflection, Silicon, Spectroscopy, Zinc oxide, Dielectrics, Atomic layer deposition, Polarization, Metamaterials

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Proceedings Article | 10 September 2019 Presentation

Designer thin-film based perfect light absorption and its applications in structural coloring, gas sensing, and solar-thermal conversion (Conference Presentation)

Mohamed El Kabbash, Theodor Letsou, Michael Hinczewski, Giuseppe Strangi, Chunlei Guo

Proceedings Volume 11089, 1108904 (2019) https://doi.org/10.1117/12.2528370

KEYWORDS: Thin films, Absorption, Nanophotonics, Lithography, Metamaterials, Metals, Reflectivity, Oxides, Refractive index, Hydrogen

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Proceedings Article | 9 September 2019 Presentation

Fano resonance in thin-film optical coatings (Conference Presentation)

Mohamed El Kabbash, Chunlei Guo, Giuseppe Strangi

Proceedings Volume 11080, 110801A (2019) https://doi.org/10.1117/12.2528327

KEYWORDS: Thin films, Optical coatings, Thin film coatings, Solar energy, Solar cells, Metamaterials, Absorption, Reflection, Distributed Bragg reflectors, Visible radiation

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Proceedings Article | 9 September 2019 Presentation

Hybrid thermal and electric and thermal solar energy generation based on thin-film optical coatings (Conference Presentation)

Mohamed El Kabbash, Chunlei Guo, Subhash Singh, Giuseppe Strangi, Michael Hinczewski

Proceedings Volume 11121, 111210C (2019) https://doi.org/10.1117/12.2528363

KEYWORDS: Solar energy, Thin films, Thin film coatings, Optical coatings, Energy efficiency, Solar cells, Photovoltaics, Energy conversion efficiency, Beam splitters, Optical components

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Proceedings Article | 17 September 2018 Presentation

Plasmons at the interface between physics and medicine (Conference Presentation)

Giuseppe Strangi

Proceedings Volume 10722, 1072207 (2018) https://doi.org/10.1117/12.2321316

KEYWORDS: Plasmons, Medicine, Interfaces, Physics, Plasmonics, Metamaterials, Imaging systems, Nanotechnology, Light-matter interactions, Photodynamic therapy

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Proceedings Article | 8 September 2011 Paper

Universal soft matter template: from photonic to metamaterial applications

Cesare Umeton, Luciano De Sio, Roberto Caputo, Sameh Ferjani, Giuseppe Strangi, Roberto Bartolino

Proceedings Volume 8114, 81140W (2011) https://doi.org/10.1117/12.892781

KEYWORDS: Liquid crystals, Polymers, Metamaterials, Diffraction gratings, Silver, Photonic metamaterials, Holography, Nanoparticles, Chemistry, Composites

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Proceedings Article | 9 May 2007 Paper

Random lasing in dye doped nematic liquid crystals: the role of confinement geometry

G. Strangi, S. Ferjani, V. Barna, A. De Luca, C. Versace, N. Scaramuzza, R. Bartolino

Proceedings Volume 6587, 65870P (2007) https://doi.org/10.1117/12.722887

KEYWORDS: Random lasers, Liquid crystals, Laser scattering, Light scattering, Scattering, Multiple scattering, Photons, Luminescence, Molecules, Capillaries

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Showing 5 of 9 publications

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