Temperature dependence of the gain profile for THz quantum cascade lasers

Details Temperature dependence of the gain profile for THz quantum cascade lasers Temperature dependence of the gain profile for THz quantum cascade lasers

2007-11-16

arxiv.org/abs/0711.2645v2

Appl. Phys. Lett. 92, 081102 (2008)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

10.1063/1.2884686

We study the rapid decrease of peak gain in resonant-phonon THz Quantum Cascade Lasers with increasing temperature. The effect of various microscopic scattering processes on the gain profile as a function of temperature is discussed. We argue that increased broadening, primarily due to increased impurity scattering, and not diminishing population inversion, is the main reason for the reduction of peak gain.

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