Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 108: Poster: Ultra-fast phenomena / Optical properties / Semiconductor laser / Devices and device concepts

HL 108.21: Poster

Donnerstag, 3. April 2014, 17:00–20:00, P1

Phenomenological model for simulation of mid-infrared quantum cascade lasers — •Sergii S. Kurlov, Yuri V. Flores, Mikaela Elagin, Mykhaylo P. Semtsiv, and W. Ted Masselink — Humboldt University Berlin, Institute of Physics, Newtonstrasse 15, D-12489 Berlin, Germany

A phenomenological scattering-rate model for THz quantum cascade lasers is extended for mid-infrared (MIR) quantum cascade lasers (QCLs) by accounting for the energy dependence of the intersubband scattering rate beyond the phonon energy. This energy dependence is obtained from the fit of the intersubband scattering rates based on published life-times of a number of MIR QCLs. The model is currently built under assumption of low temperature, i. e., neglecting the phonon absorption by charge carriers. Using the model and solving the rate equations with periodical boundary conditions we found a good agreement with a number of published MIR QCLs in terms of current-voltage-, power-current-, and spectral-gain-characteristics. We demonstrate the matching of the modelled results and the low-temperature experimental data for a broad-gain quantum cascade laser, where gain broadening with the current (voltage) is essential.

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