Mr. Dmitry Yu. Zagursky Profile

Dmitry Yu. Zagursky

at MV Lomonosov Moscow State Univ

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Author

Publications (12)

Proceedings Article | 1 April 2020 Paper

Stabilizing optical vortex bullets by absorption at quadratic nonlinearity

Aleksei Kalinovich, Boris Bryantsev, Dmitry Yu. Zagursky, Irina Zakharova

Proceedings Volume 11358, 113581W (2020) https://doi.org/10.1117/12.2555479

KEYWORDS: Absorption, Solitons, Waveguides, Optical vortices, Spiral phase plates, Wave propagation, Dispersion, Numerical simulations, Radio propagation, Light wave propagation

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Proceedings Article | 30 April 2019 Paper

Vortex light bullets forming at second harmonic generation

Aleksey Kalinovich, Maria Komissarova, Irina Zakharova, Dmitrii Zagursky

Proceedings Volume 11026, 110260M (2019) https://doi.org/10.1117/12.2520747

KEYWORDS: Solitons, Waveguides, Dispersion, Harmonic generation, Light wave propagation, Diffraction, Wave propagation, Physics, Numerical simulations, Liquid crystals

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Proceedings Article | 5 October 2017 Presentation + Paper

New approach for detection and identification of substances using THz TDS

Vyacheslav Trofimov, Irina Zakharova, Dmitry Yu. Zagursky, Svetlana Varentsova

Proceedings Volume 10441, 1044107 (2017) https://doi.org/10.1117/12.2280531

KEYWORDS: Terahertz radiation, Absorption, Signal detection, Computer simulations, Spectral resolution, Dielectrics, Harmonic generation, Dielectric polarization, Molecules, Electromagnetism

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Proceedings Article | 23 August 2017 Paper

Substance identification by pulsed THz spectroscopy in the presence of disordered structure

Vyacheslav Trofimov, Irina Zakharova, Dmitry Zagursky Yu., Svetlana Varentsova

Proceedings Volume 10383, 103830H (2017) https://doi.org/10.1117/12.2275317

KEYWORDS: Terahertz radiation, Spectroscopy, Absorption, Signal detection, Databases, Computer simulations, Maxwell's equations, Sensors

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Proceedings Article | 18 May 2017 Presentation + Paper

Detection and identification of substances using noisy THz signal

Vyacheslav Trofimov, Irina Zakharova, Dmitry Yu. Zagursky, Svetlana Varentsova

Proceedings Volume 10194, 101942O (2017) https://doi.org/10.1117/12.2263316

KEYWORDS: Terahertz radiation, Signal detection, Receivers, Humidity, Absorption, Computer simulations, Maxwell's equations, Explosives, Molecules

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Proceedings Article | 24 October 2016 Presentation + Paper

How can we distinguish between simulants and hazardous substances under real conditions?

V. Trofimov, Svetlana Varentsova, Irina Zakharova, Dmitry Yu. Zagursky

Proceedings Volume 9995, 99950H (2016) https://doi.org/10.1117/12.2241773

KEYWORDS: Terahertz radiation, Computer simulations, Absorption, Picosecond phenomena, Signal to noise ratio, Signal detection, Dielectrics, Absorbance, Spectral resolution

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Proceedings Article | 26 September 2016 Presentation + Paper

Influence of disordered cover on cascade mechanism of medium response spectrum broadening at THz-TDS of substance

Vyacheslav Trofimov, Dmitry Yu. Zagursky, Irina Zakharova

Proceedings Volume 9934, 993409 (2016) https://doi.org/10.1117/12.2238858

KEYWORDS: Terahertz radiation, Computer simulations, Remote sensing, Absorption, Electromagnetism, Polarization, Molecules, Ions, Radio propagation, Dielectrics

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Proceedings Article | 3 May 2016 Paper

Pulsed THz TDS of objects covered by disordered structure

V. Trofimov, I. Zakharova, D. Zagursky, Svetlana Varentsova

Proceedings Volume 9823, 98230F (2016) https://doi.org/10.1117/12.2225168

KEYWORDS: Terahertz radiation, Computer simulations, Spectroscopy, Signal analyzers, Absorption, Signal detection, Dielectrics, Spectral resolution, Molecules

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Proceedings Article | 21 April 2016 Paper

THz TDS of substance covered by disordered structure

V. Trofimov, D. Zagursky, I. Zakharova

Proceedings Volume 9885, 98851N (2016) https://doi.org/10.1117/12.2229218

KEYWORDS: Terahertz radiation, Reflectance spectroscopy, Disordered photonic crystals, Spectroscopy, Distortion, Dielectrics, Dispersion, Wave propagation, Photonic crystals, Terahertz radiation, Computer simulations, Absorption, Fiber lasers, Mirrors, Absorbance, Dielectric polarization

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Proceedings Article | 21 April 2016 Paper

Distortion of THz substance spectrum by transparent disordered cover

V. Trofimov, D. Zagursky, I. Zakharova

Proceedings Volume 9917, 991730 (2016) https://doi.org/10.1117/12.2229535

KEYWORDS: Optical inspection, Absorption spectroscopy, Terahertz radiation, Remote sensing, Absorption, Dielectrics, Electromagnetism, Solids, Radio propagation, Numerical simulations, Computer simulations

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Proceedings Article | 25 February 2016 Paper

Pulsed THz spectroscopy of substance under disordered opaque cover

V. Trofimov, D. Yu. Zagursky, I. Zakharova

Proceedings Volume 9747, 97470T (2016) https://doi.org/10.1117/12.2214501

KEYWORDS: Terahertz radiation, Spectroscopy, Distance measurement, Opacity, Absorption, Dielectrics, Computer simulations, Active optics, Mirrors, Quantum mechanics, Remote sensing, Distortion, Disordered photonic crystals

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Remote sensing using the pulsed THz-TDS is of great interest because of its possible practical applications. Many ordinary materials (paper, for example) are transparent to THz radiation while the hazardous substances, which have to detect, possess fingerprints in this frequency range. However, cover of ordinary material can distort its spectrum in such a way that the spectrum of reflected THz pulse or transmitted THz pulse will contain absorption frequencies, which are inherent to dangerous substance (explosives, illistic drugs....), despite their absence in the material under consideration. This is a consequence of covering material influence due to its density fluctuation or its structure variation, for example. As rule, covering material structure fluctuation may be comparable with some wavelengths of the probing THz radiation. Thus, the cover can act as a disordered photonic structure with respect to incident THz pulse and its action results in additional absorption spectral lines appearance and in turn, the incorrect substance identification will take place. In this paper we discuss an influence of quasi-periodic structure with variable dielectric constant on the spectrum of a substance, which is placed behind or inside such structure. The investigation is conducted by means of computer simulation. We consider a single layer of optically active substance placed between two covers consisting of linear layers with random dielectric permittivity. Incident Gaussian pulse with a few-cycles falls on the substance covered by layers. Both transmitted pulse and reflected pulse are analyzed and their spectra are compared to those of the incident pulse. For description of a THz pulse interaction with an optically active substance covered by disordered structures we use the Maxwell’s equations together with matrix-density formalism. The appearance of additional spectrum extremes due to the layered structure influence is illustrated. Computer simulation results were confirmed by physical experiment. We provided the experiments with paper bag, and ordinary sheets of paper, and napkins

Proceedings Article | 21 October 2015 Paper

Principal limitation of standard THz time-domain spectroscopy method of the detection and identification of substance and way of its overcoming

Vyacheslav Trofimov, Svetlana Varentsova, Irina Zakharova, Dmitry Zagursky

Proceedings Volume 9652, 96520B (2015) https://doi.org/10.1117/12.2195809

KEYWORDS: Terahertz radiation, Signal detection, Picosecond phenomena, Absorption, Explosives, Spectroscopy, Absorbance, Computer simulations, Humidity

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Showing 5 of 12 publications

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