Low frequency terahertz quantum cascade laser operating from 1.6 to 1.8 THz

摘要

The authors report a GaAs/Al_(0.1)Ga_(0.9)As quantum cascade laser based on a bound-to-continuum transition optimized for low frequency operation. High tunability of the gain curve is achieved by the Stark effect and laser emission is measured between 1.6 and 1.8 THz. Pulsed mode operation up to 95 K and continuous wave operation up to 80 K are reported. The dynamical range in current is as high as 43%.