Journal
APPLIED PHYSICS LETTERS
Volume 111, Issue 10, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4993600
Keywords
-
Categories
Funding
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA-0003525]
- National Science Foundation [1407711]
- National Aeronautics and Space Administration [NNX16AC73G]
- Directorate For Engineering [1407711] Funding Source: National Science Foundation
- Div Of Electrical, Commun & Cyber Sys [1407711] Funding Source: National Science Foundation
Ask authors/readers for more resources
A terahertz quantum-cascade (QC) vertical-external-cavity surface-emitting-laser (VECSEL) is demonstrated with over 5 mW power in continuous-wave and single-mode operation above 77 K, in combination with a near-Gaussian beam pattern with a full-width half-max divergence as narrow as similar to 5 degrees x 5 degrees, with no evidence of thermal lensing. This is realized by creating an intra-cryostat VECSEL cavity to reduce the cavity loss and designing an active focusing metasurface reflector with low power dissipation for efficient heat removal. Also, the intra-cryostat configuration allows the evaluation of QC-VECSEL operation vs. temperature, showing a maximum pulsed mode operating temperature of 129 K. While the threshold current density in the QC-VECSEL is higher compared to that in a conventional edge-emitting metal-metal waveguide QC-laser, the beam quality, slope efficiency, maximum power, and thermal resistance are all significantly improved. Published by AIP Publishing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available