Comparative analysis of resonant phonon THz quantum cascade lasers

Details Comparative analysis of resonant phonon THz quantum cascade lasers Comparative analysis of resonant phonon THz quantum cascade lasers

2009-11-04

arxiv.org/abs/0911.0854v2

J. Appl. Phys. 101, 086109 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

3 pages, 3 figures

Scientific paper

10.1063/1.2719683

We present a comparative analysis of a set of GaAs-based THz quantum cascade lasers, based on longitudinal-optical phonon scattering depopulation, by using an ensemble Monte Carlo simulation, including both carrier-carrier and carrier-phonon scattering. The simulation shows that the parasitic injection into the states below the upper laser level limits the injection efficiency and thus the device performance at the lasing threshold. Additional detrimental effects playing an important role are identified. The simulation results are in reasonable agreement with the experimental findings.

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