InGaAs-AlInAs/InP terahertz quantum cascade laser

摘要

Operation of a quantum-cascade laser based on the In_(0.52)Al_(0.48)As-In_(0.53)Ga_(0.47)As/InP material is demonstrated at a frequency of 3.6 terahertz. The active region is based on a bound-to-continuum transition combined with an optical phonon extraction. The optical waveguide exploits a combination of metallic and dielectric confinement. Threshold current density of 460 A/cm~2 at 10 K and a maximum operating temperature of 45 K are achieved.