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Your search keyword '"Aleshkin, Vladimir Ya."' showing total 29 results
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29 results on '"Aleshkin, Vladimir Ya."'

1. Ultra-compact injection terahertz laser using the resonant inter-layer radiative transitions in multi-graphene-layer structure

Author

Dubinov, Alexander A., Bylinkin, Andrey, Aleshkin, Vladimir Ya., Ryzhii, Victor, Otsuji, Taiichi, and Svintsov, Dmitry

Subjects
Condensed Matter - Mesoscale and Nanoscale Physics, Physics - Optics
Abstract

The optimization of laser resonators represents a crucial issue for the design of terahertz semiconductor lasers with high gain and low absorption loss. In this paper, we put forward and optimize the surface plasmonic metal waveguide geometry for the recently proposed terahertz injection laser based on resonant radiative transitions between tunnel-coupled grapheme layers. We find an optimal number of active graphene layer pairs corresponding to the maximum net modal gain. The maximum gain increases with frequency and can be as large as ~ 500 cm-1 at 8 THz, while the threshold length of laser resonator can be as small as ~ 50 mkm. Our findings substantiate the possibility of ultra-compact voltage-tunable graphene-based lasers operating at room temperature., Comment: 11 pages, 6 figures

Published
2016
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3. Balancing the Number of Quantum Wells in HgCdTe/CdHgTe Heterostructures for Mid-Infrared Lasing

Author

Fadeev, Mikhail A., primary, Dubinov, Alexander A., additional, Razova, Anna A., additional, Yantser, Arina A., additional, Utochkin, Vladimir V., additional, Rumyantsev, Vladimir V., additional, Aleshkin, Vladimir Ya., additional, Gavrilenko, Vladimir I., additional, Mikhailov, Nikolai N., additional, Dvoretsky, Sergey A., additional, and Morozov, Sergey V., additional

Published
2022
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5. Stimulated Emission up to 2.75 µm from HgCdTe/CdHgTe QW Structure at Room Temperature

Author

Utochkin, Vladimir V., primary, Kudryavtsev, Konstantin E., additional, Dubinov, Alexander A., additional, Fadeev, Mikhail A., additional, Rumyantsev, Vladimir V., additional, Razova, Anna A., additional, Andronov, Egor V., additional, Aleshkin, Vladimir Ya., additional, Gavrilenko, Vladimir I., additional, Mikhailov, Nikolay N., additional, Dvoretsky, Sergey A., additional, Teppe, Frederic, additional, and Morozov, Sergey V., additional

Published
2022
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6. Coherent Emission in the Vicinity of 10 THz due to Auger-Suppressed Recombination of Dirac Fermions in HgCdTe Quantum Wells

Author

Morozov, Sergey V., primary, Rumyantsev, Vladimir V., additional, Zholudev, Maksim S., additional, Dubinov, Alexander A., additional, Aleshkin, Vladimir Ya., additional, Utochkin, Vladimir V., additional, Fadeev, Mikhail A., additional, Kudryavtsev, Konstantin E., additional, Mikhailov, Nikolay N., additional, Dvoretskii, Sergey A., additional, Gavrilenko, Vladimir I., additional, and Teppe, Frederic, additional

Published
2021
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7. Far-infrared stimulated emission of Dirac fermions in CdHgTe heterostructures

Author

Morozov, Sergey V., primary, Rumyantsev, Vladimir V., additional, Zholudev, Maxim S., additional, Dubinov, Alexander A., additional, Aleshkin, Vladimir Ya., additional, Utochkin, Vladimir V., additional, Fadeev, Mikhail A., additional, Kudryavtsev, Konstantin E., additional, Mikhailov, Nikolay N., additional, Dvoretsky, Sergey A., additional, Gavrilenko, Vladimir I., additional, and Teppe, Frederic, additional

Published
2021
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9. Mid-infrared stimulated emission in HgCdTe/CdHgTe quantum well heterostructures at room temperature

Author

Fadeev, Mikhail A., primary, Troshkin, Alexander O., additional, Dubinov, Alexander A., additional, Utochkin, Vladimir V., additional, Razova, Anna A., additional, Rumyantsev, Vladimir V., additional, Aleshkin, Vladimir Ya., additional, Gavrilenko, Vladimir I., additional, Mikhailov, Nikolay N., additional, Dvoretsky, Sergey A., additional, and Morozov, Sergey V., additional

Published
2020
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10. Far and Mid IR Stimulated Emission in HgCdTe QW Heterostructures

Author

Gavrilenko, Vladimir I., primary, Dvoretskii, Sergey A., additional, Teppe, Frederic, additional, Sirtori, Carlo, additional, Morozov, Sergey V., additional, Rumyantsev, Vladimir V., additional, Fadeev, Mikhail A., additional, Utochkin, Vladimir V., additional, Kulikov, Nikita S., additional, Dubinov, Alexandre A., additional, Aleshkin, Vladimir Ya., additional, and Mikhailov, Nikolay N., additional

Published
2019
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16. Gain Enhancement Effect of Surface Plasmon Polaritons on Terahertz Stimulated Emission in Optically Pumped Monolayer Graphene

Author

Kawasaki, Tetsuya, primary, Watanabe, Takayuki, additional, Fukushima, Tetsuya, additional, Yabe, Yuhei, additional, Tombet, Stephane Albon Boubanga, additional, Satou, Akira, additional, Dubinov, Alexander A, additional, Aleshkin, Vladimir Ya, additional, Mitin, Vladimir, additional, Ryzhii, Victor, additional, and Otsuji, Taiichi, additional

Published
2014
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20. First experiments and prospects of intracavity difference -frequency generation of mid/far-infrared and terahertz radiation in diode lasers

Author

Aleshkin, Vladimir Ya., primary, Kukushkin, Vladimir A., additional, Maremyanin, Kirill V., additional, Morozov, Sergey V., additional, Nekorkin, Sergey M., additional, Zvonkov, Boris N., additional, Andrianov, Alexey V., additional, Belyanin, Alexey A., additional, Biryukov, Anton A., additional, Dubinov, Alexander A., additional, Ershov, Alexey V., additional, Gavrilenko, Vladimir I., additional, Kocharovsky, Vitaly V., additional, and Kocharovsky, Vladimir V., additional

Published
2008
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21. Observation of room-temperature intracavity difference-frequency generation in butt-joint diode lasers

Author

Aleshkin, Vladimir Ya., primary, Belyanin, Alexey A., additional, Biryukov, Anton A., additional, Dubinov, Alexander A., additional, Ershov, Alexey V., additional, Gavrilenko, Vladimir I., additional, Kocharovsky, Vitaly V., additional, Kocharovsky, Vladimir V., additional, Maremyanin, Kirill V., additional, Morozov, Sergey V., additional, Nekorkin, Sergey M., additional, and Zvonkov, Boris N., additional

Published
2008
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23. Electron Capture in van der Waals Graphene-Based Heterostructures with WS2 Barrier Layers.

Author

Aleshkin, Vladimir Ya., Dubinov, Alexander A., Ryzhii, Maxim, Ryzhii, Victor, and Taiichi Otsuji

Abstract

We consider the capture processes of hot electrons propagating across the van der Waals heterostructures with graphene layers (GLs) and WS2 barrier layers. The capture probability of hot electrons into GLs as a function of the electron energy and the electric field as well as the capture probability averaged over the electron energy distribution are calculated accounting for their scattering on the optical phonons and on the electrons localized in GLs. Our calculations show that the total probability of these processes is rather low (less than 0.5%). Since the capture probability of hot electrons into GLs essentially determines the performance of the vertical hot-electron transistors with the GL base and the vertical hot-electron terahertz photodetectors, the obtained results support the prospects of these and other GL devices. [ABSTRACT FROM AUTHOR]

Published
2015
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28. The gain enhancement effect of surface plasmon polaritons on terahertz stimulated emission in optically pumped monolayer graphene.

Author

Takayuki Watanabe, Tetsuya Fukushima, Yuhei Yabe, Stephane Albon Boubanga Tombet, Akira Satou, Dubinov, Alexander A., Aleshkin, Vladimir Ya, Mitin, Vladimir, Victor Ryzhii, and Taiichi Otsuji

Subjects
PHONONS, ATOMS, QUANTUM theory, MECHANICS (Physics), PHOTONS
Abstract

Nonlinear carrier relaxation/recombination dynamics and the resultant stimulated terahertz (THz) photon emission with excitation of surface plasmon polaritons (SPPs) in photoexcited monolayer graphene has been experimentally studied using an optical pump/THz probe and an optical probe measurement. We observed the spatial distribution of the THz probe pulse intensities under linear polarization of optical pump and THz probe pulses. It was clearly observed that an intense THz probe pulse was detected only at the area where the incoming THz probe pulse takes a transverse magnetic (TM) mode capable of exciting the SPPs. The observed gain factor is in fair agreement with the theoretical calculations. Experimental results support the occurrence of the gain enhancement by the excitation of SPPs on THz stimulated emission in optically pumped monolayer graphene. [ABSTRACT FROM AUTHOR]

Published
2013
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29. Mid-infrared stimulated emission in HgCdTe/CdHgTe quantum well heterostructures at room temperature.

Author

Fadeev, Mikhail A., Troshkin, Alexander O., Dubinov, Alexander A., Utochkin, Vladimir V., Razova, Anna A., Rumyantsev, Vladimir V., Aleshkin, Vladimir Ya., Gavrilenko, Vladimir I., Mikhailov, Nikolay N., Dvoretsky, Sergey A., and Morozov, Sergey V.

Subjects
STIMULATED emission, HETEROSTRUCTURES, QUANTUM wells, ELECTRON-hole recombination, TEMPERATURE, HOT carriers
Abstract

Heterostructures with quantum wells (QWs) based on HgCdTe are promising systems for making compact semiconductor sources of the mid-infrared range. This range has paramount practical importance due to the presence of absorption lines of common pollutant gases. Stimulated emission (SE) from HgCdTe heterostructures has been observed previously at the wavelengths up to 3.7 μm at temperatures above 200 K, but the optimal design of the QW is still debated. We present the spectra of SE from a HgCdTe-based heterostructure obtained at room temperature (RT). We investigate the effect of optical excitation wavelength on the characteristics of SE and discuss possible routes toward improving the design of the active region of the sample. Obtained results demonstrate that HgCdTe heterostructures can be used for the creation of lasers operating at RT at the wavelengths in the vicinity of at least 2.5 μm. [ABSTRACT FROM AUTHOR]

Published
2021
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