Worrall Chris, Alton Jesse, Houghton Mark, Barbieri Stefano, Beere Harvey E, Ritchie David, Sirtori Carlo
Opt Express. 2006 Jan 9;14(1):171-81. doi: 10.1364/opex.14.000171.
We report the operation of a 2 THz quantum cascade laser based on a GaAs/Al(0.1)Ga(0.9)As heterostructure. The laser transition is between an isolated subband and the upper state of a 14 meV wide miniband. Lasing action takes place on a high order vertical mode of a 200 microm thick double-metallic waveguide. In pulsed mode operation, with a 3.16mm long device, we report a threshold current density of 115 A/cm(2) at T = 4K, with a maximum measured peak power of 50 mW. The device shows lasing action in continuous wave up to 47K, with a maximum power in excess of 15 mW at T = 4K.
我们报道了基于GaAs/Al(0.1)Ga(0.9)As异质结构的2太赫兹量子级联激光器的运行情况。激光跃迁发生在一个孤立子带与一个14毫电子伏特宽的微带的上能级之间。激光作用发生在一个200微米厚的双金属波导的高阶垂直模式上。在脉冲模式运行中，对于一个3.16毫米长的器件，我们报道在T = 4K时阈值电流密度为115 A/cm²，测量到的最大峰值功率为50毫瓦。该器件在高达47K的连续波中表现出激光作用，在T = 4K时最大功率超过15毫瓦。
