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Title: Focusing metasurface quantum-cascade laser with a near diffraction-limited beam

Journal Article · · Optics Express
DOI:https://doi.org/10.1364/oe.24.024117· OSTI ID:1340512
 [1];  [1];  [1];  [2];  [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

A terahertz vertical-external-cavity surface-emitting-laser (VECSEL) is demonstrated using an active focusing reflectarray metasurface based on quantum-cascade gain material. The focusing effect enables a hemispherical cavity with flat optics, which exhibits higher geometric stability than a plano-plano cavity and a directive and circular near-diffraction limited Gaussian beam with M2 beam parameter as low as 1.3 and brightness of 1.86 × 106 Wsr–1m–2. As a result, this work initiates the potential of leveraging inhomogeneous metasurface and reflectarray designs to achieve high-power and high-brightness terahertz quantum-cascade VECSELs.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1340512
Report Number(s):
SAND-2016-8993J; OPEXFF; 647332
Journal Information:
Optics Express, Vol. 24, Issue 21; ISSN 1094-4087
Publisher:
Optical Society of America (OSA)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 27 works
Citation information provided by
Web of Science

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Cited By (11)

Photonic Engineering Technology for the Development of Terahertz Quantum Cascade Lasers journal July 2019
Broadband continuous single-mode tuning of a short-cavity quantum-cascade VECSEL journal September 2019
Terahertz quantum cascade VECSEL with watt-level output power journal July 2018
High-resolution terahertz spectroscopy with quantum-cascade lasers journal April 2019
THz Emission by Frequency Down-conversion in Topological Insulator Quantum Dots journal September 2019
Terahertz plasmonic lasers with narrow beams and large tunability conference February 2017
Spin-controlled twisted laser beams: intra-cavity multi-tasking geometric phase metasurfaces journal January 2018
Homogeneous spectral broadening of pulsed terahertz quantum cascade lasers by radio frequency modulation journal January 2018
High-intensity and low-divergence THz laser with 1D autofocusing symmetric Airy beams journal January 2019
Metasurface quantum-cascade laser with electrically switchable polarization journal January 2017
Continuous-wave laser operation of a dipole antenna terahertz microresonator journal March 2017

Figures / Tables (7)


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