Semiconductor physics

Optical losses of a waveguide with superconducting plates in terahertz quantum cascade lasers

A. A. Dubinov^ab, D. V. Ushakov^c, A. A. Afonenko<sup>c

a</sup> Institute for Physics of Microstructures, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
^b National Research Lobachevsky State University of Nizhny Novgorod, 603950 Nizhny Novgorod, Russia
^c Belarusian State University, 220030 Minsk, Belarus

Abstract: The paper calculates the optical losses of a waveguide with superconducting YBCO plates for a quantum cascade laser with a generation frequency of 1.2 THz at a temperature of 10 K. It is shown that the use of such plates in terahertz quantum cascade lasers with a small number of cascades ($\sim$20) will significantly reduce losses compared to traditionally used gold and silver plates.

Keywords: waveguide, terahertz range, quantum cascade laser, superconductor.

Received: 30.11.2023
Revised: 06.12.2023
Accepted: 06.12.2023

DOI: 10.61011/FTP.2023.08.56971.5813

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