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Title: Terahertz metasurface quantum-cascade VECSELs: theory and performance

A longstanding challenge for terahertz quantum-cascade (QC) lasers is achieving both a high power and high-quality beam pattern, this is due in part due to their use of sub-wavelength metallic waveguides. Recently, the vertical-external-cavity surface-emitting laser (VECSEL) concept was demonstrated for the first time in the terahertz range and for a QC-laser. This is enabled by the development of an amplifying metasurface reflector capable of coupling incident free-space THz radiation to the QC-laser material such that it is amplified and re-radiated. The THz metasurface QC-VECSEL initiates a new approach for making QC-lasers with high power and excellent beam pattern. Furthermore, the ability to engineer the electromagnetic phase, amplitude, and polarization response of the metasurface enables lasers with new functionality. Our article provides an overview of the fundamental theory, design considerations, and recent results for high-performance THz QC-VECSELs.
Authors:
ORCiD logo [1] ;  [1] ;  [1] ;  [2] ;  [1] ; ORCiD logo [1]
  1. Univ. of California, Los Angeles, CA (United States). Dept. of Electrical Engineering
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Center of Integrated Nanotechnologies
Publication Date:
Report Number(s):
SAND-2017-4613J
Journal ID: ISSN 1077-260X; 652954; TRN: US1702158
Grant/Contract Number:
AC04-94AL85000
Type:
Accepted Manuscript
Journal Name:
IEEE Journal of Selected Topics in Quantum Electronics
Additional Journal Information:
Journal Volume: 23; Journal Issue: 6; Journal ID: ISSN 1077-260X
Publisher:
IEEE Lasers and Electro-optics Society
Research Org:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE National Nuclear Security Administration (NNSA)National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; quantum cascade laser; VECSEL; terahertz; metasurface; reflectarray
OSTI Identifier:
1356861