Open AccessМодель терагерцового квантово-каскадного лазера на основе двумерного плазмона
Author(s) -
А.А. Дубинов,
В.Я. Алешкин
Publication year - 2021
Publication title -
fizika i tehnika poluprovodnikov
Language(s) - English
Resource type - Journals
eISSN - 1726-7315
pISSN - 0015-3222
DOI - 10.21883/ftp.2021.10.51435.34
Subject(s) - plasmon , terahertz radiation , electric field , quantum well , cascade , optoelectronics , quantum , electron , active medium , physics , materials science , optics , chemistry , quantum mechanics , laser , chromatography
In this work, we calculated the characteristics of a two-dimensional plasmon amplified by an active medium based on a terahertz quantum-cascade structure. It is shown that for realistic parameters of GaAs/AlGaAs structures with quantum wells (mobility 2×105 cm2V-1s-1 at an electron concentration of 5×1011 cm-2 and at temperatures up to 77 K), the gain of a two-dimensional plasmon can reach 1500 cm-1 for frequency 2.3 THz. In addition, due to the strong localization of the plasmon electric field near the quantum well, only a few cascades of the active medium are required for amplification.