Terahertz quantum cascade laser based on direct LO-phonon-scattering depopulation
Abstract
We report the development of a quantum cascade laser at the longest wavelength to date, λ = 87.2 μm (3.44 THz). The laser structure uses direct longitudinal-optical phonon scattering to depopulate the lower radiative state. Laser action is demonstrated in pulsed mode at temperatures up to 65 K, and at 50% duty cycle up to 29 K. At 5 K in pulsed mode, the peak power is approximately 2.5 mW, and the threshold current density is 840 A/cm^2.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2003
- Bibcode:
- 2003APS..MAR.X8012W