Výsledky vyhledávání - "V.S. Cherkassky"

'Perfect' Terahertz Vortex Beams Formed Using Diffractive Axicons and Prospects for Excitation of Vortex Surface Plasmon Polaritons

Autor: O. E. Kameshkov, V.S. Cherkassky, Boris A. Knyazev

Publikováno v: Applied Sciences
Volume 11
Issue 2
Applied Sciences, Vol 11, Iss 717, p 717 (2021)

Transformation of a Bessel beam by a lens results in the formation of a &ldquo
perfect&rdquo
vortex beam (PVB) in the focal plane of the lens. The PVB has a single-ring cross-section and carries an orbital angular momentum (OAM) equal to th

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Experiments on Generation of Vortex Surface Plasmon Polaritons on Plane and Cylindrical Conductors in Mid-Infrared and THz Ranges

Autor: Nikolay Vinokurov, O. E. Kameshkov, K. N. Tukmakov, A. N. Agafonov, N. D. Osintseva, Spartak E. Krasnopevtsev, A. K. Nikitin, Vasily V. Gerasimov, V.S. Cherkassky, A. G. Lemzyakov, Yulia Yu. Choporova, Vladimir S. Pavelyev, Boris A. Knyazev

Publikováno v: 2020 45th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz).

In this article, we propose methods for the generation of surface plasmon polaritons (SPPs), both carrying orbital angular momentum, and conventional ones, using vortex Bessel beams, and also investigate the propagation of SPPs along flat and cylindr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4633c517e93d05881abdc28c34ddeac2
https://doi.org/10.1109/irmmw-thz46771.2020.9370722

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Quasi-Talbot effect with vortex beams and formation of vortex beamlet arrays

Autor: Nikolay Vinokurov, Boris A. Knyazev, Vladimir S. Pavelyev, Yulia Yu. Choporova, O. E. Kameshkov, V.S. Cherkassky

Publikováno v: Optics express. 26(11)

We study diffraction of Bessel vortex beams with topological charges of ±1 and ±2 and a wavelength of 130 µm on two-dimensional amplitude periodic gratings. Results of simulations and experiments at the Novosibirsk Free Electron Laser facility sho

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https://pubmed.ncbi.nlm.nih.gov/29877459

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Recording and reconstruction of in-line holograms of amplitude objects in the terahertz frequency range using a free electron laser

Autor: T. N. Irgalin, M. G. Vlasenko, Boris A. Knyazev, V.S. Cherkassky, Yu. Yu. Choporova, Vasily V. Gerasimov

Publikováno v: Radiophysics and Quantum Electronics. 54:585-590

Until now, holography experiments in the terahertz frequency range have been performed using only pulsed broadband sources and the time domain imaging technique. In this paper, we study the feasibility of the classical holographic technique in this s

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https://doi.org/10.1007/s11141-012-9317-9

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Real-Time Imaging Using a High-Power Monochromatic Terahertz Source: Comparative Description of Imaging Techniques with Examples of Application

Autor: Yulia Yu. Choporova, V.S. Cherkassky, Boris A. Knyazev, D. G. Esaev, Vasily V. Gerasimov, Mikhail A. Dem’yanenko, M. G. Vlasenko

Publikováno v: Journal of Infrared, Millimeter, and Terahertz Waves. 32:1207-1222

Gradually appearing high-power terahertz sources require the development of adequate imaging techniques. This paper describes four imaging techniques (with a thermal recorder, temperature-sensitive phosphor plates, a visible-light thermal sensitive F

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f6b1d25635e3c7250f2376a14e6b957
https://doi.org/10.1007/s10762-011-9773-x

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Obtaining spectrally selective images of objects in attenuated total reflection regime in real time in visible and terahertz ranges

Autor: V.S. Cherkassky, Boris A. Knyazev, Vasily V. Gerasimov

Publikováno v: Optics and Spectroscopy. 108:859-865

An imaging attenuated total reflection (ATR) spectrometer for the terahertz range is created for the first time. The spectrometer uses a powerful free-electron laser. Images are recorded with a microbolom-eter detector array as a source of frequency

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cf69e66686c829d086ba28a1f528b931
https://doi.org/10.1134/s0030400x10060068

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Diffractive optical elements and quasioptical schemes for experiments on a high-power terahertz free-electron laser

Autor: Nikolay Vinokurov, V.S. Cherkassky, G.N. Kulipanov, Boris A. Knyazev, L. A. Merzhievsky, A. V. Konysheva, I. A. Polskikh, S. A. Zhigach

Publikováno v: Radiophysics and Quantum Electronics. 50:803-812

We have developed reflective diffraction optical elements (DOE) for focusing monochromatic coherent radiation of 400 W terahertz Novosibirsk free-electron laser (FEL). Operational characteristics of two modifications of the refractive kinoform lenses

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5607cda280ecfb495ba509f08a572a36
https://doi.org/10.1007/s11141-007-0071-3

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Fresnel reflection in optical components and detectors for the terahertz frequency band

Autor: V.S. Cherkassky, P. D. Rudych, Vasily V. Gerasimov, Boris A. Knyazev

Publikováno v: Instruments and Experimental Techniques. 50:524-529

Plane-parallel dielectric and semiconductor windows, beam splitters and radiation absorbers, as well as reflecting metal surfaces, are important components used in experiments with monochromatic terahertz radiation. The wavelengths of this radiation

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b3b26e69baf4f8be1a696e261c66271
https://doi.org/10.1134/s0020441207040161

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Visualization of radiation from a high-power terahertz free electron laser with a thermosensitive interferometer

Autor: V. M. Popik, Boris A. Knyazev, A. N. Matveenko, V.S. Cherkassky, M. A. Shcheglov, G. N. Kulipanov, Nikolay Vinokurov

Publikováno v: Technical Physics. 52:911-919

A thermosensitive interferometer based on a plane-parallel glass plate is used for visualization of a high-power terahertz radiation. The plane wavefront of visible radiation emitted by a semiconductor laser is reflected from the two surfaces of the

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https://doi.org/10.1134/s1063784207070134

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Techniques for introscopy of condense matter in terahertz spectral region

Autor: G.M. Ivanov, L.A. Lukyanchikov, Vasily V. Gerasimov, V.S. Cherkassky, G.N. Kulipanov, Nikolay Vinokurov, Boris A. Knyazev, L.A. Merzhievsky

Publikováno v: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 575:63-67

Feasibility study of the introscopy of solids and biological objects using high-power terahertz-free-electron laser radiation was performed. A complete set of quasi-optical elements (beam-splitters, windows, mirrors, zone plates and kinoform lens), d

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::68caf2f7ca92338261d59ed6447c9c72
https://doi.org/10.1016/j.nima.2007.01.025

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