Open AccessMulti‐Watt high‐power THz frequency quantum cascade lasers
Author(s) -
Li L.H.,
Chen L.,
Freeman J.R.,
Salih M.,
Dean P.,
Davies A.G.,
Linfield E.H.
Publication year - 2017
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.2017.0662
Subject(s) - terahertz radiation , optoelectronics , materials science , laser , cascade , optics , cryostat , photomixing , quantum cascade laser , semiconductor laser theory , waveguide , far infrared laser , physics , semiconductor , quantum mechanics , chemistry , superconductivity , terahertz metamaterials , chromatography
Multi‐Watt high‐power terahertz (THz) frequency quantum cascade lasers are demonstrated, based on a single, epitaxially grown, 24‐μm‐thick active region embedded into a surface‐plasmon waveguide. The devices emit in pulsed mode at a frequency of ∼4.4 THz and have a maximum operating temperature of 132 K. The maximum measurable emitted powers from a single facet are ∼2.4 W at 10 K and ∼1.8 W at 77 K, with no correction being made for the optical collection efficiency of the apparatus, or absorption by the cryostat polyethylene window.