Dr. Svetlana A. Varentsova Profile

Dr. Svetlana A. Varentsova

at MV Lomonosov Moscow State Univ

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Author

Publications (37)

Proceedings Article | 11 March 2024 Presentation + Paper

About possibility of the broadband THz pulse’s spectrum finding based on measurements in time for a substance response at some frequencies

Zhongwei Yan, Vyacheslav Trofimov, Yongqiang Yang, Changjun Han, Svetlana Varentsova

Proceedings Volume 12885, 128850A (2024) https://doi.org/10.1117/12.2691419

KEYWORDS: Terahertz radiation, Absorption, Windows, Pulse signals, Picosecond phenomena, Spectroscopy, Spectral response, Spectral resolution, Reflection, Time metrology

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Proceedings Article | 18 October 2019 Presentation + Paper

Role of the pulse duration at measurements of spectral signatures of substances in THz range of frequencies

Vyacheslav Trofimov, Nan-Nan Wang, Jing-Hui Qiu, Svetlana Varentsova

Proceedings Volume 11164, 1116405 (2019) https://doi.org/10.1117/12.2535016

KEYWORDS: Terahertz radiation, Absorption, Databases, Frequency conversion

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Proceedings Article | 14 May 2018 Paper

New method of substance detection and identification using the substance emission frequency up-conversion in the THz frequency range

Vyacheslav Trofimov, Irina Zakharova, Svetlana Varentsova

Proceedings Volume 10639, 106392C (2018) https://doi.org/10.1117/12.2301151

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Explosives, Molecules, Computer simulations, Signal detection, Humidity, Dielectrics, Spectral resolution

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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 | 25 May 2016 Paper

High effective THz-TDS method for the detection and identification of substances in real conditions

Vyacheslav Trofimov, Svetlana Varentsova, Vasiliy Tikhomirov, Vladislav Trofimov

Proceedings Volume 9836, 98362U (2016) https://doi.org/10.1117/12.2208454

KEYWORDS: Terahertz radiation, Explosives, Absorption, Humidity, Picosecond phenomena, Signal detection, Semiconductors, Absorbance, Interference (communication), Silicon

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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 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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Proceedings Article | 31 August 2015 Paper

High effective algorithm of the detection and identification of substance using the noisy reflected THz pulse

Vyacheslav Trofimov, Svetlana Varentsova, Vladislav Trofimov, Vasily Tikhomirov

Proceedings Volume 9585, 95850I (2015) https://doi.org/10.1117/12.2189303

KEYWORDS: Terahertz radiation, Absorbance, Silicon, Absorption, Picosecond phenomena, Semiconductors, Explosives, Humidity, Signal detection

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Proceedings Article | 21 May 2015 Paper

Possibility of the detection and identification of substance at long distance using the noisy reflected THz pulse under real conditions

Vyacheslav Trofimov, Svetlana Varentsova, Vladislav Trofimov

Proceedings Volume 9483, 94830P (2015) https://doi.org/10.1117/12.2177991

KEYWORDS: Terahertz radiation, Picosecond phenomena, Explosives, Signal detection, Absorption, Absorbance, Humidity, Reflection, Semiconductors

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Proceedings Article | 14 May 2015 Paper

Efficiency of using the spectral dynamics analysis for pulsed THz spectroscopy of both explosive and other materials

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 9454, 945409 (2015) https://doi.org/10.1117/12.2178001

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

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Proceedings Article | 7 October 2014 Paper

Real-time criteria based on spectral dynamics of medium response for the detection and identification of substance using THz signal

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 9253, 925305 (2014) https://doi.org/10.1117/12.2064348

KEYWORDS: Terahertz radiation, Picosecond phenomena, Explosives, Absorption, Calibration, Reflection, Absorbance, Signal detection, Reflectivity

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Proceedings Article | 7 October 2014 Paper

Possibility of the detection and identification of substance at long distance at using broad THz pulse

Vyacheslav Trofimov, Svetlana Varentsova, Vladislav Trofimov

Proceedings Volume 9253, 925308 (2014) https://doi.org/10.1117/12.2064354

KEYWORDS: Terahertz radiation, Picosecond phenomena, Calibration, Explosives, Mirrors, Absorption, Humidity, Signal detection, Spectroscopy

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Proceedings Article | 5 September 2014 Paper

Transmission of THz pulse with a few circles through opaque samples placed at long distance (4-6 metres)

Vyacheslav Trofimov, Svetlana Varentsova, Vladislav Trofimov

Proceedings Volume 9199, 91990E (2014) https://doi.org/10.1117/12.2059763

KEYWORDS: Terahertz radiation, Picosecond phenomena, Mirrors, Polarization, Absorption, Calibration, Femtosecond phenomena, Spectroscopy, Signal detection

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Proceedings Article | 4 June 2014 Paper

Effective criteria developing for the identification of substance using the reflected THz signal

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 9082, 90820B (2014) https://doi.org/10.1117/12.2049407

KEYWORDS: Terahertz radiation, Picosecond phenomena, Explosives, Absorption, Signal detection, Reflection, Reflectivity, Magnesium, Calibration

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Proceedings Article | 21 May 2014 Paper

Peculiarities of the detection and identification of substance at long distance

Vyacheslav Trofimov, Svetlana Varentsova, Vladislav Trofimov, Vasily Tikhomirov

Proceedings Volume 9102, 910203 (2014) https://doi.org/10.1117/12.2049405

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Signal detection, Mirrors, Explosives, Calibration, Reflection, Time metrology

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Proceedings Article | 16 October 2013 Paper

Effective criteria for the identification of substance using the spectral lines dynamics of reflected THz signal

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 8901, 890106 (2013) https://doi.org/10.1117/12.2029005

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Explosives, Absorbance, Signal detection, Reflection, Defense and security, Analytical research, Magnesium

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Proceedings Article | 23 May 2013 Paper

Influence of surface of explosive on its detection and identification using the SDA method for analysis of the reflected THz signal

Vyacheslav Trofimov, Svetlana Varentsova, Mieczyslaw Szustakowski, Norbert Palka

Proceedings Volume 8734, 87340Q (2013) https://doi.org/10.1117/12.2015604

KEYWORDS: Picosecond phenomena, Terahertz radiation, Explosives, Absorption, Correlation function, Reflectivity, Signal detection, Explosives detection, Reflection, Mirrors

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Proceedings Article | 9 May 2012 Paper

Efficiency of the detection and identification of ceramic explosive using the reflected THz signal

Vyacheslav Trofimov, Svetlana Varentsova, Mieczyslaw Szustakowski, Norbert Palka

Proceedings Volume 8363, 83630M (2012) https://doi.org/10.1117/12.919750

KEYWORDS: Terahertz radiation, Picosecond phenomena, Ceramics, Absorption, Explosives, Specular reflections, Reflection, Absorbance, Superposition, Signal detection

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Proceedings Article | 7 May 2012 Paper

Detection and identification of compound explosive using the SDA method of the reflected THz signal

Vyacheslav Trofimov, Svetlana Varentsova, Mieczyslaw Szustakowski, Norbert Palka

Proceedings Volume 8382, 83820B (2012) https://doi.org/10.1117/12.919746

KEYWORDS: Terahertz radiation, Picosecond phenomena, Explosives, Absorption, Specular reflections, Reflection, Absorbance, Transparency, Superposition, Signal detection

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Proceedings Article | 13 October 2011 Paper

Efficiency of the detection of explosive using the spectral dynamics analysis of reflected signal

Vyacheslav Trofimov, Svetlana Varentsova, Mieczyslaw Szustakowski, Norbert Palka, Tomasz Trzcinski

Proceedings Volume 8189, 81890I (2011) https://doi.org/10.1117/12.897917

KEYWORDS: Terahertz radiation, Explosives, Picosecond phenomena, Absorption, Signal detection, Reflection, Specular reflections, Signal analyzers, Statistical analysis, Transparency

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Proceedings Article | 3 June 2011 Paper

2D signature for detection and identification of drugs

Vyacheslav Trofimov, Svetlana Varentsova, Jingling Shen, Cunlin Zhang, Qingli Zhou, Yulei Shi

Proceedings Volume 8040, 804007 (2011) https://doi.org/10.1117/12.883674

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Transparency, Signal detection, Biological research, Chemical analysis, Explosives, Fourier transforms, Visible radiation

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Proceedings Article | 26 May 2011 Paper

The method of the spectral dynamics analysis of reflected signal for problem of identification of substance

Vyacheslav Trofimov, Svetlana Varentsova, Norbert Palka, Mieczyslaw Szustakowski, Tomasz Trzcinski

Proceedings Volume 8023, 80230O (2011) https://doi.org/10.1117/12.883672

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Explosives, Magnesium, Reflection, Spectroscopy, Mirrors, Transparency, Signal detection

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Proceedings Article | 5 November 2010 Paper

2D THz and GHz signature for identification of explosive on reflected THz signal

Vyacheslav Trofimov, Svetlana Varentsova, Jian Chen

Proceedings Volume 7854, 785409 (2010) https://doi.org/10.1117/12.870320

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Explosives, Signal analyzers, Signal detection, Statistical analysis, Molecules, Reliability, Receivers

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The method of THz spectrum dynamics analysis (SDA - Spectral dynamics analysis - method) is applied for the detection and identification of substances by using the signal reflected from sample. It allows to obtain the spectrogram - composite Fourier spectrum dynamics - of the signal and to analyze the dynamics of many spectral lines simultaneously, even if the measurements are made on short time interval (less than 50 ps). The efficiency of the SDA method used for longer time intervals (more than 100 ps) is discussed also. The Fourier-Gabor sliding window method is used for obtaining the spectrogram. We consider the examples of finding the pure RDX and harmless materials (L-Tartaric Acid, Sucrose, PTFE) or their mixture in pellets by using a THz pulse reflected from them. A THz pulse with a few cycles falls on the sample and reflects from it. The receiver makes the discrete measurements of electric field strength of signal reflected from the sample. To restore the signal to the required accuracy the SVD - Single Value Decomposition - technique is used. Our investigations show that the spectrograms and dynamics of several spectral lines of the THz pulse reflected differ from the corresponding spectrograms and dynamics of spectral lines for the reference pulse under certain conditions and hence it is possible to detect the presence of the material in the sample of interest. The comparison of the Fourier spectrum of the substance with the corresponding spectrum calculated on the base of using an autocorrelation function for obtaining the spectrum shows that the AC-spectrum gives us essential less information about substance. From our consideration follows that in some cases the analysis of reflected signal on the short time interval (less than 50 ps) is insufficient for the reliable identification. It is necessary to analyze the response on the long time interval (about 300 - 400 ps). The analysis of spectrogram and spectral lines dynamics on the long time intervals gives the additional information about registering sub-pulses, which are appeared due to multi-reflection of THz wave from the boundaries of sample and from the reflecting elements of set-up, and relaxation times of excited energy levels of molecules. Hence, the reliability of identification increases.

Proceedings Article | 12 October 2010 Paper

Identification of explosive using the spectrum dynamics of reflected THz and GHz radiation

Vyacheslav Trofimov, Svetlana Varentsova, Jian Chen

Proceedings Volume 7837, 78370G (2010) https://doi.org/10.1117/12.864873

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Explosives, Statistical analysis, Signal analyzers, Molecules, Signal detection, Receivers, Reliability

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Proceedings Article | 12 October 2010 Paper

Identification of substance in complicated mixture of simulants under the action of THz radiation on the base of SDA (spectral dynamics analysis) method

Vyacheslav Trofimov, Svetlana Varentsova, Arunas Krotkus, Gediminas Molis

Proceedings Volume 7838, 78380B (2010) https://doi.org/10.1117/12.864871

KEYWORDS: Terahertz radiation, Picosecond phenomena, Absorption, Molecules, Correlation function, Explosives, Transparency, Defense and security, Reconstruction algorithms, Time metrology

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Proceedings Article | 4 May 2010 Paper

2D THz signature for substance identification

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 7687, 768707 (2010) https://doi.org/10.1117/12.849977

KEYWORDS: Terahertz radiation, Absorption, Explosives, Picosecond phenomena, Transparency, Molecules, Acoustics, Signal detection, Modulation, Opacity

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Proceedings Article | 27 April 2010 Paper

Method of THz spectrum dynamics analysis for identification of compound medium

Vyacheslav Trofimov, Svetlana Varentsova, Jian Chen

Proceedings Volume 7671, 76710G (2010) https://doi.org/10.1117/12.849983

KEYWORDS: Terahertz radiation, Absorption, Explosives, Signal detection, Transparency, Picosecond phenomena, Reconstruction algorithms, Explosives detection, Defense and security, Visible radiation

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Proceedings Article | 25 September 2009 Paper

Multichannel system for restoration of signal and for the identification of a medium

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 7486, 74860M (2009) https://doi.org/10.1117/12.830166

KEYWORDS: Terahertz radiation, Absorption, Acoustics, Explosives, Interference (communication), Signal processing, Switching, Picosecond phenomena, Image registration, Francium

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Proceedings Article | 25 September 2009 Paper

Identification of explosive media using spectrum dynamics under the action of a THz pulse

Vyacheslav Trofimov, Svetlana Varentsova, Jian Chen, Xi-Cheng Zhang

Proceedings Volume 7486, 74860A (2009) https://doi.org/10.1117/12.830162

KEYWORDS: Terahertz radiation, Absorption, Explosives, Transparency, Picosecond phenomena, Molecules, Analytical research, Signal detection, Receivers, Pulsed laser operation

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Proceedings Article | 1 May 2009 Paper

About efficiency of identification of materials using spectrum dynamics of medium response under the action of THz radiation

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 7311, 73110U (2009) https://doi.org/10.1117/12.818340

KEYWORDS: Terahertz radiation, Absorption, Fourier transforms, Time metrology, Molecules, Spectroscopy, Pulsed laser operation, Picosecond phenomena, Explosives, Reconstruction algorithms

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Proceedings Article | 3 October 2008 Paper

Effective reconstruction of dynamics of medium response spectrum

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 7119, 71190N (2008) https://doi.org/10.1117/12.800607

KEYWORDS: Acoustics, Reconstruction algorithms, Terahertz radiation, Fourier transforms, Absorption, Spectroscopy, Explosives, Algorithm development, Time metrology, Molecules

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Proceedings Article | 16 July 2007 Paper

Highly effective method for temporal terahertz spectroscopy under the condition of random probe signals

Vyacheslav Trofimov, Yuri Troshchiev, Svetlana Varentsova

Proceedings Volume 6727, 67271H (2007) https://doi.org/10.1117/12.752371

KEYWORDS: Reconstruction algorithms, Terahertz spectroscopy, Spectroscopy, Algorithm development, Molecules, Atrial fibrillation, Fourier transforms, Molecular spectroscopy, Oscillators, Optical testing

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Proceedings Article | 13 June 2007 Paper

New method for analysis of temporal dynamics of medium spectrum under the action of terahertz pulse

Vyacheslav Trofimov, Svetlana Varentsova

Proceedings Volume 6537, 653703 (2007) https://doi.org/10.1117/12.753907

KEYWORDS: Fourier transforms, Reconstruction algorithms, Molecules, Spectroscopy, Algorithm development, Polarization, Atrial fibrillation, Optical testing, Terahertz spectroscopy, Femtosecond phenomena

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Proceedings Article | 3 June 2002 Paper

Influence of dispersion of nonlinear response on the self-action of femtosecond pulse in optical fiber

Vyacheslav Trofimov, Svetlana Varentsova, Alexsei Volkov

Proceedings Volume 4706, (2002) https://doi.org/10.1117/12.469588

KEYWORDS: Nonlinear response, Femtosecond phenomena, Computer simulations, Optical fibers, Dispersion, Radio propagation, Silicon, Radon, Laser development, Gaussian pulse

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Showing 5 of 37 publications

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