Open AccessTunable quantum-cascade VECSEL operating at 1.9 THz
Author(s) -
Yu Sheng Wu,
Shuai Yue,
Sadhvikas J. Addamane,
John L. Reno,
Benjamin S. Williams
Publication year - 2021
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.438636
Subject(s) - terahertz radiation , optics , lasing threshold , optoelectronics , materials science , laser , cascade , laser beam quality , quantum cascade laser , wavelength , physics , laser beams , chemistry , chromatography
We report a terahertz quantum-cascade vertical-external-cavity surface-emitting laser (QC-VECSEL) emitting around 1.9 THz with up to 10% continuous fractional frequency tuning of a single laser mode. The device shows lasing operation in pulsed mode up to 102 K in a high-quality beam, with the maximum output power of 37 mW and slope efficiency of 295 mW/A at 77 K. Challenges for up-scaling the operating wavelength in QC metasurface VECSELs are identified.