Carrier dynamical issues for extending the operating wavelength of quantum cascade lasers

Paul Harrison; K. Donovan; Robert W. Kelsall; P. Kinsler

doi:10.1117/12.361036

9 September 1999 Carrier dynamical issues for extending the operating wavelength of quantum cascade lasers

Paul Harrison, K. Donovan, Robert W. Kelsall, P. Kinsler

Proceedings Volume 3828, Terahertz Spectroscopy and Applications II; (1999) https://doi.org/10.1117/12.361036
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany

Abstract

Electron-longitudinal optic phonon and electron-electron intersubband scattering rates are calculated for a variety of quantum well systems. It is demonstrated that the internal quantum efficiency of a Terahertz radiative intersubband transition can be greater than in the mid-IR at 4K, however by room temperature has fallen to around 20 percent. A study of the internal quantum efficiency of a Terahertz energy intersubband transition in double and single quantum wells, has shown that the vertical intrawell transition is more efficient than the diagonal interwell transition.

Citation Download Citation

Paul Harrison, K. Donovan, Robert W. Kelsall, and P. Kinsler "Carrier dynamical issues for extending the operating wavelength of quantum cascade lasers", Proc. SPIE 3828, Terahertz Spectroscopy and Applications II, (9 September 1999); https://doi.org/10.1117/12.361036

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