Open AccessHigh‐power epitaxial‐side down mounted terahertz quantum cascade lasers
Author(s) -
Li Yuanyuan,
Wang Tao,
Zhai Shenqiang,
Liu Junqi,
Liu Fengqi,
Wang Zhanguo
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2016.1802
Subject(s) - terahertz radiation , cascade , optoelectronics , laser , epitaxy , photomixing , quantum well , power (physics) , materials science , semiconductor laser theory , quantum cascade laser , optics , terahertz spectroscopy and technology , far infrared laser , physics , terahertz metamaterials , engineering , nanotechnology , layer (electronics) , chemical engineering , quantum mechanics
High‐power terahertz quantum cascade lasers at −97.4 μm based on coplanar waveguide epitaxial‐side down (Epi‐down) mounting technique are presented. With the improved thermal management, excellent performance is obtained for the Epi‐down mounted lasers. The maximum output powers of 685 mW in pulsed mode and 164 mW in continuous‐wave (C‐W) mode are realised at 10 K. The maximum C‐W wall‐plug efficiency of 1.67% is also realised. Fundamental lateral mode emissions are achieved for wide ridge lasers through a mode loss differentiation process.