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arXiv · 2002.04366

HgCdTe-based quantum cascade lasers operating in the GaAs phonon Reststrahlen band predicted by the balance equations method

D. V. Ushakov·A. A. Afonenko·R. A. Khabibullin·D. S. Ponomarev·V. Ya. Aleshkin·S. V. Morozov·A. A. Dubinov
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Abstract

HgCdTe-based quantum cascade lasers operating in the GaAs phonon Reststrahlen band with a target wavelength of 36 mkm are theoretically investigated using the balance equations method. The optimized active region designs, which are based on three and two quantum wells, exhibit a peak gain exceeding 100 cm(-1) at 150 K. We analyze the temperature dependences of the peak gain and predict the maximum operation temperatures of 170 K and 225 K for three- and two-well designs, respectively. At high temperatures (T > 120 K), the better temperature performance of the two-well design is associated with a larger spatial overlap of the weakly localized lasing wavefunctions as well as a higher population inversion.

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D. V. Ushakov, A. A. Afonenko, R. A. Khabibullin, D. S. Ponomarev, V. Ya. Aleshkin, S. V. Morozov, A. A. Dubinov. 2020-02-11. HgCdTe-based quantum cascade lasers operating in the GaAs phonon Reststrahlen band predicted by the balance equations method. https://doi.org/10.1364/oe.398552

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