Terahertz quantum cascade lasers with copper metal-metal waveguides operating up to 178 K
Publication information:
Mikhail A. Belkin, Jonathan A. Fan, Sahand Hormoz, Federico Capasso, Suraj P. Khanna, Mohamed Lachab, A. Giles Davies, and Edmund H. Linfield. 2008. “Terahertz Quantum Cascade Lasers With Copper Metal-Metal Waveguides Operating up to 178 K”. OPTICS EXPRESS, 16, 5, Pp. 3242-48. doi:10.1364/OE.16.003242
Abstract
We report terahertz quantum cascade lasers operating in pulsed mode at an emission frequency of 3 THz and up to a maximum temperature of 178 K. The improvement in the maximum operating temperature is achieved by using a three-quantum-well active region design with resonant-phonon depopulation and by utilizing copper, instead of gold, for the cladding material in the metal-metal waveguides. (c) 2008 Optical Society of America.