Optical losses of a waveguide with superconducting plates in terahertz quantum cascade lasers
Dubinov A. A.
1,2, Ushakov D. V.3, Afonenko A. A.3
1Institute for Physics of Microstructures, Russian Academy of Sciences, Nizhny Novgorod, Russia
2Lobachevsky State University, Nizhny Novgorod, Russia
3Belarusian State University, Minsk, Republic of Belarus
Email: sanya@ipmras.ru, UshakovDV@bsu.by, a.afonenka@mail.ru
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 (~20) will significantly reduce losses compared to traditionally used gold and silver plates. Keywords: waveguide, terahertz range, quantum cascade laser, superconductor.
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