Author(s): Weijiang Li; Yu Ma, Yunfei Xu; Junqi Liu; Lijun Wang; Ning Zhuo; Quanyong Lu; Jinchuan Zhang; Shenqiang Zhai; Shuman Liu and Fengqi Liu

Source: PHOTONICS RESEARCH Volume: 10 Issue: 12 Pages: 2686-2692 DOI: 10.1364/PRJ.467974 Published: DEC 1 2022

Abstract: We report on the terahertz (THz) quantum cascade lasers in continuous-wave (CW) operation with an emitting frequency above 5 THz. Excellent performance with a smaller leakage current and higher population inversion efficiency is obtained by one-well bridged bound-to-continuum hybrid quantum design at 5 THz. By designing and fabricating a graded metallic sampled distributed feedback grating in the waveguide, the first single-mode THz quantum cascade laser at 5.13 THz in CW operation mode is achieved. The maximum single-mode optical power of similar to 48 mW is achieved at 15 K with a side-mode suppression ratio above 24 dB. This will draw great interest in the spectroscopy applications above the 5 THz range for THz quantum cascade lasers.(c) 2022 Chinese Laser Press

Accession Number: WOS:000914456800002

Author Identifiers:

Author        Web of Science ResearcherID        ORCID Number

liu, jun qi                  0000-0003-1654-6174

ISSN: 2327-9125

Full Text: https://opg.optica.org/prj/fulltext.cfm?uri=prj-10-12-2686&id=518912