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Low threshold THz QC lasers with thin core regions

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9 Author(s)
Chassagneux, Y. ; Inst. d''Electronique Fondamentale, Univ. Paris-Sud, Orsay ; Palomo, J. ; Colombelli, R. ; Barbieri, S.
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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

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Electronics Letters  (Volume:43 ,  Issue: 5 )