Quantum cascade lasers operating from 1.2 to 1.6 THz

Two terahertz quantum cascade lasers based on GaAs/Al0.1Ga0.9As heterostructures are reported. Pulsed mode operation up to 84 K and continuous wave (cw) power of 0.36 mW at 10 K are demonstrated for the laser which emits from 1.34 to 1.58 THz. The other laser shows emission from 1.2 to 1.32 THz with pulsed mode operation up to 69 K and cw power of 0.12 mW at 10 K. (C) 2007 American Institute of Physics.