Non-equilibrium green's function calculation for terahertz quantum cascade lasers

H. Yasuda, T. Kubis, P. Vogl, N. Sekine, I. Hosako, K. Hirakawa

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Remarkable progress on terahertz quantum cascade lasers (THz-QCLs) has been made since their first demonstration in 2002 [1]. However, operation of THz-QCLs at room temperature has not yet been realized. Recently, our group and Yamanishi et al. proposed novel designs of THz-QCLs, called the four-level (4L) scheme, which promises a much higher gain than the current phonon-depopulation (RP) designs of a three-level scheme [2,3]. The 4L scheme intends to improve electron injection to the upper lasing level, utilizing an additional subband level. Operation of the indirect-pump 4L QCL proposed by Yamanishi et al. at 8 m was reported [3]. The characteristic temperature T0 of 303 K of this laser is the highest among the reported QCLs.

Original languageEnglish
Title of host publication34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
DOIs
StatePublished - 2009
Event34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009 - Busan, Korea, Republic of
Duration: 21 Sep 200925 Sep 2009

Publication series

Name34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009

Conference

Conference34th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2009
Country/TerritoryKorea, Republic of
CityBusan
Period21/09/0925/09/09

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