Zhukavin R. Kh.1, Fadeev M A.1, Antonov A. V.1, Postnov D. A.1,2, Kovalevsky K. A.1, Morozov S. V. 1,2, Dubinov A. A. 1,2, Afonenko A. A.3, Ushakov D. V.3, Pavlov A. Yu.4, Ponomarev D. S. 4, Khabibullin R. A. 4, Gavrilenko V. I.1,2
1Institute for Physics of Microstructures, Afonino, Kstovo region, Nizhny Novgorod district, Russia
2Lobachevsky State University, Nizhny Novgorod, Russia
3Belarusian State University, Minsk, Republic of Belarus
4National Research Center “Kurchatov Institute”, Moscow, Russia
Email: zhur@ipmras.ru, fadeev@ipmras.ru, aav@ipmras.ru, d.postnow@yandex.ru, atan4@yandex.ru, more@ipmras.ru, sanya@ipmras.ru, a.afonenka@mail.ru, ushakovdvu@gmail.com, isvch@isvch.ru, ponomarev_dmitr@mail.ru, khabibullin_r@mail.ru, gavr@ipmras.ru
Transport and emission characteristics of a quantum cascade laser with a "resonant-phonon" design with an emission frequency of 2.3 THz in high magnetic fields up to 11.5 T at liquid helium temperature were studied experimentally and theoretically. In the 5-6 T magnetic field range, suppression of generation was observed due to "resonant" scattering from the zero Landau level (associated with the upper laser level) to the first Landau level (associated with the lower laser level) leading to a reduction in the population inversion of the working transition of the laser. A threefold decrease in the laser's threshold current was demonstrated under a strong magnetic field up to 11.5 T (compared to the zero field), attributed to the zerodimensional nature of electron states, which suppresses parasitic scattering. Keywords: quantum cascade laser, terahertz range, current-voltage characteristics, emission characteristics, strong magnetic field.
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