Dr. Rafal Kotyński Profile

Dr. Rafal Kotyński

at Univ of Warsaw

SPIE Involvement:

Author

Publications (32)

Proceedings Article | 6 June 2023 Presentation + Paper

Presentation + Paper

Plasmon-enhanced high operating temperature infrared photodetectors

Andrzej Janaszek, Piotr Wróbel, Rafał Kotyński, Maciej Dems, Ömer Ceylan, Yasar Gurbuz, Łukasz Kubiszyn, Józef Piotrowski

Proceedings Volume 12568, 125680R (2023) https://doi.org/10.1117/12.2665259

KEYWORDS: Simulations, Electric fields, Heterojunctions, Finite-difference time-domain method, Refractive index, Long wavelength infrared, Transmittance, Gold, Gallium arsenide, Dielectrics, Detector development, Infrared detection, Infrared radiation, Infrared detectors, Superlattices

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Proceedings Article | 30 April 2019 Presentation + Paper

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 | 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 | 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 | 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 | 15 December 2010 Paper

Paper

Sub-wavelength imaging using silver-dielectric metamaterial layered prism

Marcin Stolarek, Anna Pastuszczak, Jacek Pniewski, Rafał Kotyński

Proceedings Volume 7746, 774613 (2010) https://doi.org/10.1117/12.883603

KEYWORDS: Prisms, Metamaterials, Dielectrics, Light wave propagation, Silver, Interfaces, Wave propagation, Spatial frequencies, Finite-difference time-domain method, Imaging systems

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Proceedings Article | 15 December 2010 Paper

Paper

Transparency and super-resolution in metal-dielectric layered structures

Rafal Kotynski

Proceedings Volume 7746, 774605 (2010) https://doi.org/10.1117/12.882139

KEYWORDS: Point spread functions, Imaging systems, Silver, Super resolution, Image resolution, Optical components, Fourier optics, Transparency, Spatial filters, Near ultraviolet

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Proceedings Article | 29 April 2010 Paper

Paper

Imaging in the visible wavelength range through anisotropic layered flat lens operating in the canalization regime

Anna Pastuszczak, Rafal Kotynski

Proceedings Volume 7711, 771122 (2010) https://doi.org/10.1117/12.853824

KEYWORDS: Silver, Skin, Light wave propagation, Interfaces, Dielectrics, Point spread functions, Super resolution, Tissue optics, Spatial frequencies, Titanium dioxide

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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

Imaging in the visible wavelength range through anisotropic layered flat lens operating in the canalization regime

Anna Pastuszczak, Rafal Kotyński

Proceedings Volume 7353, 735319 (2009) https://doi.org/10.1117/12.821676

KEYWORDS: Silver, Point spread functions, Modulation transfer functions, Dielectrics, Fabry–Perot interferometers, Polarization, Interfaces, Waveguides, Photonic crystals, Spatial frequencies

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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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Proceedings Article | 20 November 2008 Paper

Paper

Interplay of spatial filtering and dispersive effects in metamaterial superlenses

Jacek Pniewski, Rafał Kotyński

Proceedings Volume 7141, 71411G (2008) https://doi.org/10.1117/12.822397

KEYWORDS: Gaussian beams, Metamaterials, Refractive index, Spatial filters, Interfaces, Wave propagation, Beam propagation method, Refraction, Superlenses

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Proceedings Article | 6 May 2008 Paper

Paper

Analysis of two-dimensional polarisation-coupled impulse response in multilayered metallic flat lens

Rafał Kotyński, Karol Król, Jacek Pniewski, Krassimir Panajotov

Proceedings Volume 6987, 69870G (2008) https://doi.org/10.1117/12.786346

KEYWORDS: Modulation transfer functions, Polarization, Silver, Imaging systems, Beam shaping, Multilayers, Linear filtering, Fourier transforms, Spatial filters, Wave propagation

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Proceedings Article | 6 May 2008 Paper

Paper

Finite element analysis of waveguide mode coupling through a sub-structured metallic flat lens

Rafał Kasztelanic, Rafał Kotyński

Proceedings Volume 6987, 698727 (2008) https://doi.org/10.1117/12.786381

KEYWORDS: Silver, Waveguides, Finite element methods, Modulation transfer functions, Waveguide modes, Magnetism, Polarization, Numerical analysis, Nanostructures, Surface plasmon polaritons

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Proceedings Article | 22 April 2008 Paper

Paper

Spatial filtering of the light beam with a layered silver flat lens

Rafał Kotyński, Karol Król, Jacek Pniewski

Proceedings Volume 7008, 70081J (2008) https://doi.org/10.1117/12.797355

KEYWORDS: Modulation transfer functions, Polarization, Silver, Optical filters, Beam shaping, Dispersion, Spatial filters, Wave propagation, Imaging systems, Near field optics

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Proceedings Article | 4 May 2007 Paper

Paper

Filtering properties of the LHM-RHM layered structures

Karol Król, Jacek Pniewski, Rafał Kotyński

Proceedings Volume 6581, 658110 (2007) https://doi.org/10.1117/12.724543

KEYWORDS: Modulation transfer functions, Gaussian beams, Modulation, Optical filters, Wave propagation, Spatial filters, Absorption, Signal attenuation, Beam propagation method, Refractive index

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Proceedings Article | 28 September 2005 Paper

Paper

Analysis of translation invariant metallic or double-negative material structures

Rafal Kotynski, Krassimir Panajotov, Tomasz Szoplik

Proceedings Volume 5955, 595511 (2005) https://doi.org/10.1117/12.623356

KEYWORDS: Photonics, Dispersion, Photonic crystals, Waveguides, Refractive index, Wave propagation, Dielectrics, Metals, Cladding, Metamaterials

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Proceedings Article | 23 May 2005 Paper

Paper

Analysis of data from optical sensors with composite filtering

R. Kasztelanic, Rafal Kotynski, Hugo Thienpont, K. Chalasinska-Macukow

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.624248

KEYWORDS: Signal detection, Optical sensors, Composites, Sensors, Optical filters, Detection and tracking algorithms, Optical fibers, Electronic filtering, Signal analyzers, Pattern recognition

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Proceedings Article | 23 May 2005 Paper

Paper

Bandgap tuning through material anisotropy as a novel physical mechanism for liquid crystal filled photonic crystal fiber sensors

Rafal Kotynski, M. Antkowiak, Hugo Thienpont, K. Panajotov

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623500

KEYWORDS: Liquid crystals, Polarization, Refractive index, Optical fibers, Silica, Photonic crystal fibers, Anisotropy, Cladding, Photonic crystals, Birefringence

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Proceedings Article | 23 May 2005 Paper

Paper

Sensitivity of highly birefringent photonic bandgap fibers to temperature and strain

Marcin Szpulak, Tadeusz Martynkien, Jacek Olszewski, Waclaw Urbanczyk, Tomasz Nasilowski, Rafal Kotynski, Francis Berghmans, Hugo Thienpont

Proceedings Volume 5855, (2005) https://doi.org/10.1117/12.623453

KEYWORDS: Optical fibers, Sensors, Birefringence, Cladding

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Proceedings Article | 8 September 2004 Paper

Paper

Light propagation in birefringent doped-core holey fibers

Tomasz Nasilowski, Rafal Kotynski, Maciej Antkowiak, Francis Berghmans, Hugo Thienpont

Proceedings Volume 5576, (2004) https://doi.org/10.1117/12.581616

KEYWORDS: Optical fibers, Refractive index, Cladding, Fiber Bragg gratings, Photonic crystal fibers, Specialty optical fibers, Step index fibers, Silica, Fiber lasers, Waveguides

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Proceedings Article | 8 September 2004 Paper

Paper

Photonic crystal fibers: state of the art and future perspectives

Tomasz Nasilowski, Rafal Kotynski, Francis Berghmans, Hugo Thienpont

Proceedings Volume 5576, (2004) https://doi.org/10.1117/12.581509

KEYWORDS: Optical fibers, Photonic crystal fibers, Photonic crystals, Dispersion, Waveguides, Cladding, Silica, Capillaries, Wave propagation, Telecommunications

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Proceedings Article | 8 September 2004 Paper

Paper

Birefringence in photonic crystal fibers: a numerical approach based on the plane-wave method

Rafal Kotynski, Tomasz Nasilowski, Maciej Antkowiak, Francis Berghmans, Hugo Thienpont

Proceedings Volume 5576, (2004) https://doi.org/10.1117/12.581615

KEYWORDS: Birefringence, Magnetism, Photonic crystal fibers, Polarization, Dielectrics, Dispersion, Fourier transforms, Refractive index, Cladding, Silica

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Proceedings Article | 8 September 2004 Paper

Paper

Multiparameter sensitivities of birefringent photonic crystal fiber

Tomasz Nasilowski, Piotr Lesiak, Rafal Kotynski, Maciej Antkowiak, Francis Berghmans, Pawel Mergo, Jan Wojcik, Hugo Thienpont

Proceedings Volume 5576, (2004) https://doi.org/10.1117/12.581619

KEYWORDS: Birefringence, Polarization, Photonic crystal fibers, Optical fibers, Fiber optics sensors, Refractive index, Sensors, Wave propagation, Numerical simulations, Optical design

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Proceedings Article | 30 November 2001 Paper

Paper

Pattern recognition with selective and adjustable discrimination

Maria Sagrario Millan Garcia-Verela, Elisabet Perez, Katarzyna Chalasinska-Macukow, Rafal Kotynski

Proceedings Volume 10302, 103020C (2001) https://doi.org/10.1117/12.449674

KEYWORDS: Pattern recognition, Tolerancing, Nonlinear dynamics, Complex systems, Joint transforms, Optical correlators, Control systems, Lead, Optoelectronics, Optical filters

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The discrimination capability requirements of pattern recognition systems may vary depending on the application and the characteristics of the objects to analyse. Our goal is to obtain a single system with a wide and smooth control of its discrimination capability in two senses: the first one, a discrimination capability selective to different aspects of the target (for example, shape, intensity, colour, texture); the second one, a discrimination capability with variable level of sensitivity -or tolerance- to the differences between an object and the target in the aspect selected. This purpose lead us to consider higher levels of complexity in the sensitivity of the recognition system. Thus, we obtain pattern recognition with high discrimination capability for a given aspect along with certain tolerance for another aspect, or vice versa. In this work, we build an optoelectronic system for pattern recognition with selective and adjustable discrimination capability by applying a dual nonlinear correlation model to a joint transform correlator. Dual nonlinear correlation is achieved by means of two nonlinear operators that are applied to both the reference and input channels. A filtering function that limits the region of support in the Fourier plane is additionally introduced. The eventual capabilities of the real system strongly depend on some experimental conditions such as quantization, grey-level dynamic range, saturation and other technical characteristics of both the camera and the spatial light modulator used in the joint transform correlator. We explore these capabilities for a 8-bits and a 12-bits CCD camera and several available modulators. Experimental and simulated results for model and real objects - alphabetic characters, keys and screws- are presented and discussed. They demonstrate that the discrimination capability of the optical recognition system by dual nonlinear correlation can be controlled and adjusted with gradable tolerance to object variations in a given aspect.

Proceedings Article | 2 November 2000 Paper

Paper

Influence of information content of partially occluded images on the results of recognition

Katarzyna Chalasinska-Macukow, Michal Rowicki, Witold Stachera, Zbigniew Chrol, Rafal Kotynski

Proceedings Volume 4113, (2000) https://doi.org/10.1117/12.405851

KEYWORDS: Phase only filters, Electronic filtering, Target recognition, Optical correlators, Computer simulations, Optical pattern recognition, Optical analysis, Nonlinear filtering, Optical signal processing, Signal analyzers

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Proceedings Article | 18 November 1999 Paper

Paper

Optical pattern recognition based on normalized correlation

Rafal Kotynski, Katarzyna Chalasinska-Macukow

Proceedings Volume 3904, (1999) https://doi.org/10.1117/12.370406

KEYWORDS: Signal detection, Electronic filtering, Nonlinear filtering, Target detection, Pattern recognition, Optical pattern recognition, Linear filtering, Interference (communication), Numerical simulations, Target recognition

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Proceedings Article | 19 July 1999 Paper

Paper

Multi-object intensity-invariant pattern recognition with an optimal processor for correlated noise

Rafal Kotynski, Katarzyna Chalasinska-Macukow

Proceedings Volume 3749, (1999) https://doi.org/10.1117/12.354765

KEYWORDS: Signal detection, Target detection, Signal processing, Electronic filtering, Image processing, Pattern recognition, Image segmentation, Image acquisition, Image filtering, Target recognition

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Proceedings Article | 29 April 1999 Paper

Paper

Dual nonlinear correlation: optoelectronic realization and application to pattern recognition

Katarzyna Chalasinska-Macukow, Rafal Kotynski, Elisabet Perez, Maria Millan Garcia-Verela

Proceedings Volume 3729, (1999) https://doi.org/10.1117/12.346773

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Proceedings Article | 22 May 1998 Paper

Paper

Normalization of correlation filters based on the Hoelder's inequality

Rafal Kotynski, Katarzyna Chalasinska-Macukow

Proceedings Volume 3490, (1998) https://doi.org/10.1117/12.308920

KEYWORDS: Electronic filtering, Pattern recognition, Target recognition, Image filtering, Linear filtering, Optical filters, Nonlinear filtering, Numerical simulations, Signal processing, Geophysics

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Showing 5 of 32 publications

Conference Committee Involvement (4)

Metamaterials

3 April 2019 | Prague, Czech Republic

Metamaterials

26 April 2017 | Prague, Czech Republic

Metamaterials

15 April 2015 | Prague, Czech Republic

Metamaterials VIII

17 April 2013 | Prague, Czech Republic

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