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This article is cited in 3 scientific papers (total in 3 papers)
UV, IR, and terahertz optics
Thz radiation of photoconductive antennas based on $\{$LT-GaAs/GaAs:Si$\}$ superlattice structures
A. N. Klochkova, E. A. Klimova, P. M. Solyankinb, M. R. Konnikovab, I. S. Vasil'evskiic, A. N. Vinichenkoc, A. P. Shkurinovbde, G. B. Galieva a V. G. Mokerov Institute of Ultra High Frequency Semiconductor Electronics of RAS, Moscow
b Institute on Laser and Information Technologies, Russian Academy of Scienses, Shatura, Moskovskaya obl.
c National Engineering Physics Institute "MEPhI", Moscow
d International Laser Center of Moscow State University
e Faculty of Physics, Lomonosov Moscow State University
Abstract:
A material in the form of a multilayer structure based on low-temperature LT-GaAs grown on (111)A-oriented substrates is proposed for fabrication of THz photoconductive antennas. These structures contain active LT-GaAs layers and doping acceptor GaAs:Si-based layers. At the optical pump power of 19 mW and the bias voltage of 30 V, a photoconductive antenna based on the optimized $\{$LT-GaAs/GaAs:Si$\}$ (111)A structure emits THz pulses with the average power of 2.3 $\mu$W at the pulse repetition frequency of 80 MHz; the conversion efficiency is 1.2 $\times$ 10$^{-4}$. It is shown that the dependence of the integral power of THz pulses of the antenna based on the $\{$LT-GaAs/GaAs:Si$\}$ (111)A structure on the applied voltage is superlinear; the dependence of this parameter on the optical pump power is plotted as a curve with saturation. It is shown that the designed antennas have a practical application in THz spectroscopy of biological solutions.
Keywords:
pulsed THz spectroscopy, photoconductive antenna, low-temperature GaAs.
Received: 16.12.2019 Revised: 13.01.2020 Accepted: 28.02.2020
Citation:
A. N. Klochkov, E. A. Klimov, P. M. Solyankin, M. R. Konnikova, I. S. Vasil'evskii, A. N. Vinichenko, A. P. Shkurinov, G. B. Galiev, “Thz radiation of photoconductive antennas based on $\{$LT-GaAs/GaAs:Si$\}$ superlattice structures”, Optics and Spectroscopy, 128:7 (2020), 1004–1011; Optics and Spectroscopy, 128:7 (2020), 1010–1017
Linking options:
https://www.mathnet.ru/eng/os379 https://www.mathnet.ru/eng/os/v128/i7/p1004
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