Title :
Terahertz quantum cascade lasers with >1 W output powers
Author :
Lianhe Li ; Li Chen ; Jingxuan Zhu ; Freeman, J. ; Dean, P. ; Valavanis, A. ; Davies, A. Giles ; Linfield, Edmund H.
Author_Institution :
Sch. of Electron. & Electr. Eng., Univ. of Leeds, Leeds, UK
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.
Keywords :
laser beams; laser modes; microwave photonics; quantum cascade lasers; surface plasmons; terahertz wave devices; waveguide lasers; THz QCL; bound-to-continuum transition; frequency 3.4 THz; laser output powers; one-well injector; optical collection efficiency; power 1.01 W; power 420 mW; pulsed mode; surface-plasmon waveguide; temperature 10 K; temperature 123 K; temperature 77 K; terahertz frequency quantum cascade lasers;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2013.4035
