Terahertz quantum cascade lasers with >1 W output powers. Issue 4 (1st February 2014)

• Record Type: Journal Article
• Authors: Li, Lianhe; Chen, Li; Zhu, Jingxuan; Freeman, J.; Dean, P.; Valavanis, A.; Davies, A.G.; Linfield, E.H.
• Is Part Of: Electronics letters. Volume 50:Issue 4(2014)
• Page Start: 309
• Page End: 311
• Publication Date: 2014-02-01
• Subjects: quantum cascade lasers -- terahertz wave devices -- microwave photonics -- laser modes -- laser beams -- surface plasmons -- waveguide lasers; laser output powers -- terahertz frequency quantum cascade lasers -- THz QCL -- pulsed mode -- bound‐to‐continuum transition -- one‐well injector -- surface‐plasmon waveguide -- optical collection efficiency -- frequency 3.4 THz -- temperature 123 K -- temperature 10 K -- temperature 77 K -- power 1.01 W -- power 420 mW; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2013.4035
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : 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.