Open AccessTerahertz quantum cascade lasers with >1 W output powers
Author(s) -
Li Lianhe,
Chen Li,
Zhu Jingxuan,
Freeman J.,
Dean P.,
Valavanis A.,
Davies A.G.,
Linfield E.H.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2013.4035
Subject(s) - terahertz radiation , cascade , laser , optoelectronics , photomixing , optics , physics , quantum cascade laser , materials science , photonics , quantum well , semiconductor laser theory , quantum , far infrared laser , terahertz metamaterials , quantum mechanics , chemistry , chromatography
Terahertz (THz) frequency quantum cascade lasers emitting peak powers of >1 W from a single facet in the pulsed mode are demonstrated. The active region is based on a bound‐to‐continuum transition with a one‐well injector, and is embedded into a surface‐plasmon waveguide. The lasers emit at a frequency of ∼3.4 THz and have a maximum operating temperature of 123 K. The maximum measured emitted powers are ∼1.01 W at 10 K and ∼420 mW at 77 K, with no correction made to allow for the optical collection efficiency of the apparatus.