Terahertz quantum cascade lasers with copper metal-metal waveguides operating up to 178 K.
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.
Harvard School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA. mbelkin@seas.harvard.edu
Mikhail A
MA
Belkin
Jonathan A
JA
Fan
Sahand
S
Hormoz
Federico
F
Capasso
Suraj P
SP
Khanna
Mohamed
M
Lachab
A G
AG
Davies
Edmund H
EH
Linfield
D003300:Copper / Q000737:chemistry*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007259:Infrared Rays; D007834:Lasers; D008670:Metals / Q000737:chemistry; D008872:Microwaves; D055095:Optics and Photonics / Q000295:instrumentation*; D011789:Quantum Theory
D008670:Metals; D003300:Copper