Title :
High-field domains in terahertz quantum cascade laser structures based on resonant-phonon depopulation scheme
Author :
Yasuda, Hozumi ; Hosako, Iwao ; Hirakawa, Keisuke
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Koganei, Japan
Abstract :
We fabricated a few periods of THz-QCL structures with small areas to investigate the formation of high-field domains that may prevent laser oscillations. The current-voltage characteristics for a two-well THz-QCL structure did not show any signs of the formation of high-field domains.
Keywords :
electrical conductivity; microwave photonics; optical fabrication; phonons; quantum cascade lasers; current-voltage characteristics; high-field domains; resonant-phonon depopulation scheme; terahertz quantum cascade laser structures; two-well THz-QCL structure; Electric fields; Gallium arsenide; Metals; Periodic structures; Quantum cascade lasers; Substrates;
Conference_Titel :
Infrared, Millimeter, and Terahertz Waves (IRMMW-THz), 2013 38th International Conference on
Conference_Location :
Mainz
DOI :
10.1109/IRMMW-THz.2013.6665648
