title: Operation of terahertz quantum-cascade lasers at 164 K in pulsed mode and at 117 K in continuous-wave mode.
abstract: We report the demonstration of a terahertz quantum-cascade laser that operates up to 164 K in pulsed mode and 117 K in continuous-wave mode at approximately 3.0 THz. The active region was based on a resonant-phonon depopulation scheme and a metal-metal waveguide was used for modal confinement. Copper to copper thermocompression wafer bonding was used to fabricate the waveguide, which displayed improved thermal properties compared to a previous indium-gold bonding method.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Williams
authors.forename: Sushil
authors.initials: S
authors.lastname: Kumar
authors.forename: Qing
authors.initials: Q
authors.lastname: Hu
authors.forename: John
authors.initials: J
authors.lastname: Reno