Dr. Tomasz Stefaniuk Profile

Dr. Tomasz Stefaniuk

at Univ of Warsaw

SPIE Involvement:

Author | Editor

Publications (23)

Proceedings Article | 16 March 2024 Presentation

Presentation

Is SCAM (ScAlMgO4) a promising oxide material, or is it just a scam?

Henryk Teisseyre, Tomasz Stefaniuk, Malgorzata Wierzbowska, Jaroslaw Domagala, Andrzej Klos, Jaroslaw Kisielewski, Alexander Korneluk, Jan Suffczynski

Proceedings Volume PC12887, PC128870O (2024) https://doi.org/10.1117/12.3002390

KEYWORDS: Gallium nitride, Oxides, X-ray diffraction, Sapphire, Crystals, Transition metals, Spectroscopic ellipsometry, Silicon, Semiconductor materials, Scanning electron microscopy

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Proceedings Article | 4 October 2023 Presentation

Presentation

Ultrashort pulse management with nanorod and nanotube metamaterials

Anatoly Zayats, Anastasiia Zaleska, Alexey Krasavin, Anton Bykov, Francisco Rodríguez-Fortuño, Jack Kingsley-Smith, Francesco Lotti, Tomasz Stefaniuk, Jingyi Wu, Wayne Dickson

Proceedings Volume PC12646, PC1264613 (2023) https://doi.org/10.1117/12.2681399

KEYWORDS: Ultrafast phenomena, Nanotubes, Metamaterials, Gold nanorods, Plasmonics, Polarization, Optical metamaterials, Reflection, Proteins, Optical switching

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Proceedings Article | 1 May 2023 Poster + Paper

Poster + Paper

Electron beam and optical patterning of polymerizable ionic liquid-based resists

Natalia Turek, Andrea Szpecht, Aleksandra Szymańska, Tomasz Stefaniuk, Katarzyna Komorowska

Proceedings Volume 12498, 124981S (2023) https://doi.org/10.1117/12.2658445

KEYWORDS: Electron beam lithography, Electron beams, Refractive index, Viscosity, Polymer optics

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Proceedings Article | 3 October 2022 Presentation

Presentation

Berry curvature and strong light-matter coupling in liquid crystal microcavities with perovskites (Conference Presentation)

Karolina Łempicka-Mirek, Mateusz Król, Adam Wincukiewicz, Przemysław Morawiak, Rafał Mazur, Marcin Muszyński, Wiktor Piecek, Przemysław Kula, Tomasz Stefaniuk, Maria Kamińska, Luisa De Marco, Pavlos Lagoudakis, Helgi Sigurdsson, Dario Ballarini, Daniele Sanvitto, Jacek Szczytko, Barbara Piętka

Proceedings Volume PC12207, PC122070C (2022) https://doi.org/10.1117/12.2633403

KEYWORDS: Liquid crystals, Perovskite, Optical microcavities, Polaritons, Photonic crystals, Optical resonators, Excitons, Dispersion, System on a chip, Quasiparticles

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Proceedings Article | 2 April 2021 Open Access

Open Access

Paper

Dispersion management in nanorod metamaterials (Conference Presentation) (Withdrawal Notice)

Tomasz Stefaniuk, R. Margoth Córdova-Castro, Mazhar Nasir, Anatoly Zayats

Proceedings Volume 10671, 106710P (2021) https://doi.org/10.1117/12.2309513

KEYWORDS: Metamaterials, Nanorods, Ultrafast phenomena, Plasmonics, Optical communications, Optoelectronics, Geometrical optics, Control systems, Switching, Light wave propagation

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Proceedings Article | 19 May 2019 Open Access

Open Access

Paper

Nanostructured core optical fibres (Conference Presentation) (Withdrawal Notice)

Ryszard Buczynski, Alicja Anuszkiewicz, Marcin Franczyk, Adam Filipkowski, Tomasz Osuch, Dariusz Pysz, Tomasz Stefaniuk, Grzegorz Stepniewski, Damian Michalik, Hue Thi Nguyen, Mariusz Klimczak, Rafal Kasztelanic

Proceedings Volume 11029, 1102906 (2019) https://doi.org/10.1117/12.2524881

KEYWORDS: Nanostructuring, Optical fibers, Specialty optical fibers, Optoelectronics

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Proceedings Article | 27 February 2019 Paper

Paper

Ytterbium-doped nanostructured core silica fiber with built-in Bragg grating for laser applications

Marcin Franczyk, Dariusz Pysz, Konrad Markowski, Jolanta Lisowska, Alicja Anuszkiewicz, Rafał Kasztelanic, Tomasz Stefaniuk, Adam Filipkowski, Kazimierz Jędrzejewski, Tomasz Osuch, Ryszard Buczynski

Proceedings Volume 10914, 109140L (2019) https://doi.org/10.1117/12.2509913

KEYWORDS: Bragg gratings, Glasses, Nanostructuring, Germanium, Refractive index, Ytterbium, Silica, Fiber lasers, Optical fibers, Laser resonators

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Proceedings Article | 23 May 2018 Presentation

Presentation

Ultrafast pulse design in anisotropic metamaterials through nonlinear optical control (Conference Presentation)

Luke Nicholls, Francisco Rodríguez-Fortuño, Mazhar Nasir, R. Margoth Cordova-Castro, Tomasz Stefaniuk, Nicolas Olivier, Gregory Wurtz, Anatoly Zayats

Proceedings Volume 10671, 106710A (2018) https://doi.org/10.1117/12.2307108

KEYWORDS: Ultrafast phenomena, Metamaterials, Polarization, Nonlinear control, Nonlinear optics, Control systems, Nano optics, Terahertz radiation, Polarimetry, Femtosecond phenomena

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Proceedings Article | 17 December 2015 Paper

Paper

Temperature sensitivity of photonic crystal fibers infiltrated with ethanol solutions

Lanh Chu Van, Tomasz Stefaniuk, Rafał Kasztelanic, Van Cao Long, Mariusz Klimczak, Hieu Le Van, Marek Trippenbach, Ryszard Buczyński

Proceedings Volume 9816, 98160O (2015) https://doi.org/10.1117/12.2229581

KEYWORDS: Bioalcohols, Nonlinear crystals, Nonlinear optics, Liquids, Water, Refractive index, Temperature metrology, Physics, Glasses, Silica

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Proceedings Article | 17 December 2015 Paper

Paper

Dispersion engineering in soft glass photonic crystal fibers infiltrated with liquids

Tomasz Stefaniuk, Hieu Le Van, Jacek Pniewski, Van Cao Long, Aleksandr Ramaniuk, Karol Grajewski, Lanh Chu Van, Mirosław Karpierz, Marek Trippenbach, Ryszard Buczynski

Proceedings Volume 9816, 98160N (2015) https://doi.org/10.1117/12.2229482

KEYWORDS: Glasses, Liquids, Refractive index, Silica, Nonlinear crystals, Optical fibers, Optical communications, Absorption

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Proceedings Article | 6 May 2015 Paper

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

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 | 2 May 2014 Paper

Paper

Permittivity, specific resistivity and surface roughness of silver nanolayers for plasmonic applications

T. Stefaniuk, P. Wróbel, A. Wronkowska, A. Wronkowski, P. Trautman, T. Szoplik

Proceedings Volume 9125, 912519 (2014) https://doi.org/10.1117/12.2058593

KEYWORDS: Silver, Silica, Germanium, Metals, Nickel, Surface roughness, Sapphire, Plasmonics, Refractive index, Scattering

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Proceedings Article | 10 June 2013 Paper

Paper

Fabrication of plasmonic structures on LN2 cooled substrates

Tomasz Stefaniuk, Piotr Wróbel, Tomasz Szoplik

Proceedings Volume 8882, 88820B (2013) https://doi.org/10.1117/12.2032350

KEYWORDS: Silver, Germanium, Silica, Sapphire, Atomic force microscopy, Plasmonics, Metals, Temperature metrology, Multilayers, Surface roughness

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Proceedings Article | 6 May 2013 Paper

Paper

Metal-dielectric photonic devices for spatial filtering and image contrast enhancement

Anna Pastuszczak, Piotr Wróbel, Tomasz Stefaniuk, Marcin Stolarek, Mateusz Wlazło, Rafał Kotyński

Proceedings Volume 8771, 87710J (2013) https://doi.org/10.1117/12.2019813

KEYWORDS: Spatial filters, Metamaterials, Silver, Silica, Sapphire, Point spread functions, Filtering (signal processing), Spatial frequencies, Visualization, Surface roughness

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Proceedings Article | 15 April 2013 Paper

Paper

Resolution of near-field to near-field imaging with silver nanolayer

Tomasz Stefaniuk, Piotr Wróbel, Jolanta Borysiuk, Tomasz Szoplik

Proceedings Volume 8771, 87710Q (2013) https://doi.org/10.1117/12.2019009

KEYWORDS: Silver, Chromium, Near field scanning optical microscopy, Near field, Germanium, Image resolution, Near field optics, Sapphire, Plasmonics, Silica

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Proceedings Article | 1 May 2012 Paper

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

Paper

Effect of surface roughness on subwavelength imaging with layered metamaterial optical elements

T. Stefaniuk, G. Nowak, R. Kotynski

Proceedings Volume 8070, 807010 (2011) https://doi.org/10.1117/12.889188

KEYWORDS: Surface roughness, Point spread functions, Multilayers, Silver, Solids, Superlenses, Imaging systems, Super resolution, Dielectrics, Fourier transforms

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Proceedings Article | 18 May 2011 Paper

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 | 29 April 2010 Paper

Paper

Influence of fabrication accuracies of metal-dielectric layered flat lenses on their imaging properties

Tomasz Stefaniuk, Rafal Kotynski, Grzegorz Nowak, Tomasz Szoplik

Proceedings Volume 7711, 77110G (2010) https://doi.org/10.1117/12.858004

KEYWORDS: Silver, Point spread functions, Multilayers, Lenses, Metals, Dielectrics, Silica, Superlenses, Error analysis, Titanium dioxide

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Proceedings Article | 31 December 2009 Paper

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

Paper

Metal-dielectric superlens with ultra-flat phase of the modulation transfer function

Tomasz Stefaniuk, Rafał Kotyński, Tomasz Szoplik

Proceedings Volume 7353, 73530W (2009) https://doi.org/10.1117/12.821778

KEYWORDS: Point spread functions, Modulation transfer functions, Phase shift keying, Dielectrics, Wave propagation, Solids, Spatial frequencies, Finite-difference time-domain method, Diffraction, Image resolution

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Proceedings Article | 20 November 2008 Paper

Paper

Trade-off analysis of superresolution and transparency in metal-dielectric nanolayered superlens

Tomasz Stefaniuk, Rafał Kotyński, Tomasz Szoplik

Proceedings Volume 7141, 71411H (2008) https://doi.org/10.1117/12.822398

KEYWORDS: Point spread functions, Modulation transfer functions, Silver, Dielectrics, Super resolution, Near field, Image resolution, Multilayers, Wave propagation, Transparency

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Showing 5 of 23 publications

Proceedings Volume Editor (1)

SPIE Conference Volume | 30 June 2023

Metamaterials XIV

Conference Committee Involvement (2)

Metamaterials XV

7 April 2025 | Prague, Czech Republic

Metamaterials XIV

26 April 2023 | Prague, Czech Republic

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