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Inhomogeneous broadening of energy levels due to fluctuations of doping concentration in quantum-cascade lasers
Afonenko An. A.1, Afonenko A. A.
1, Ushakov D. V.1, Khabibullin R. A.2
1Belarusian State University, Minsk, Republic of Belarus
2National Research Center “Kurchatov Institute”, Moscow, Russia
2National Research Center “Kurchatov Institute”, Moscow, Russia
Email: afonenko@bsu.by
The influence of fluctuations of the concentration of charged impurities on the current-voltage characteristics of quantum-cascade lasers at the coherence length of electron wave functions exceeding the screening length of the Coulomb potential is analyzed. It is found that the value of inhomogeneous broadening of the transition lines can exceed the values for the homogeneous broadening for the corresponding levels. The value of inhomogeneous broadening appears to be larger for the wave functions, which are more separated in space. Keywords: quantum-cascade heterostructures, ionized impurities, inhomogeneous spectral broadening.
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Дата начала обработки статистических данных - 27 января 2016 г.