Title :
Low threshold THz QC lasers with thin core regions
Author :
Chassagneux, Y. ; Palomo, J. ; Colombelli, R. ; Barbieri, S. ; Dhillon, S. ; Sirtori, C. ; Beere, H. ; Alton, J. ; Ritchie, D.
Author_Institution :
Inst. d´´Electronique Fondamentale, Univ. Paris-Sud, Orsay
Abstract :
It is demonstrated that the active region thickness of THz quantum cascade lasers can be reduced by a factor of 2 without effects on the threshold current density and maximum operating temperature of the laser. Pulsed and continuous-wave operation, with a low threshold Jth= 71 A/cm2, are obtained for a 5.86 mum-thick THz QC laser. The emission is peaked at lambdasime115 mum and the waveguide resonator is based on a metal-metal geometry
Keywords :
optical resonators; optical waveguides; quantum cascade lasers; 5.86 micron; THz quantum cascade lasers; continuous-wave operation; low threshold laser; metal-metal geometry; pulsed operation; terahertz laser; thin care regions; waveguide resonator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20073842
