[20p-C401-1~16] 13.6 ナノ構造・量子現象・ナノ量子デバイス

▲ [20p-C401-10] Clarified scheme for obtaining 350K optical gain in 3~4THz GaAs/AlGaAs quantum cascade laser

〇WANG LI¹、Tsung-Tse LIN¹、Thomas Grange²、Stefan Birner²、Ke Wang^1,3、Hideki Hirayama¹ (1.RIKEN、2.nextnano, Germany、3.Nanjing University, China)

キーワード：quantum cascasde lasers

This work shows the design scheme to obtain high temperature-tolerance optical gain in terahertz quantum cascade lasers. The optical gain more than the cavity threshold is predicted above room-temperatures. The schemes can be summarized into three items, that is (1) isolated three quantum states system is created; (2) indirect injection is realized; (3) optimal oscillator strength for state lifetime balance is shown.