Terahertz quantum cascade lasers with >1 W output powers

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 fre...

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Veröffentlicht in:	Electronics letters 2014-02, Vol.50 (4), p.309-311
Hauptverfasser:	Li, Lianhe, Chen, Li, Zhu, Jingxuan, Freeman, J, Dean, P, Valavanis, A, Davies, A.G, Linfield, E.H
Format:	Artikel
Sprache:	eng
Schlagworte:	bound‐to‐continuum transition Collection Collective excitations (including excitons, polarons, plasmons and other charge-density excitations) Condensed matter: electronic structure, electrical, magnetic, and optical properties Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Emittance Exact sciences and technology frequency 3.4 THz Fundamental areas of phenomenology (including applications) Injectors laser beams laser modes laser output powers Lasers microwave photonics one‐well injector Operating temperature optical collection efficiency Optics Photonics Physics power 1.01 W power 420 mW pulsed mode Quantum cascade lasers Semiconductor lasers laser diodes Surface and interface electron states surface plasmons surface‐plasmon waveguide temperature 10 K temperature 123 K temperature 77 K terahertz frequency quantum cascade lasers terahertz wave devices THz QCL waveguide lasers Waveguides
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Beschreibung
Zusammenfassung:	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.
ISSN:	0013-5194 1350-911X 1350-911X
DOI:	10.1049/el.2013.4035