Multi‐Watt high‐power THz frequency quantum cascade lasers | Zendy

Li L.H. | Zendy; Chen L. | Zendy; Freeman J.R. | Zendy; Salih M. | Zendy; Dean P. | Zendy; Davies A.G. | Zendy; Linfield E.H. | Zendy

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Multi‐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) - watt , cascade , terahertz radiation , laser , optoelectronics , power (physics) , semiconductor laser theory , physics , quantum , quantum cascade laser , optics , materials science , engineering , quantum mechanics , chemical engineering

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.

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