Abstract
The dependences of the electronic-level positions and transition oscillator strengths on an applied electric field are studied for a terahertz quantum-cascade laser (THz QCL) with the resonant-phonon depopulation scheme, based on a cascade consisting of three quantum wells. The electric-field strengths for two characteristic states of the THz QCL under study are calculated: (i) “parasitic” current flow in the structure when the lasing threshold has not yet been reached; (ii) the lasing threshold is reached. Heat-transfer processes in the THz QCL under study are simulated to determine the optimum supply and cooling conditions. The conditions of thermocompression bonding of the laser ridge stripe with an n +-GaAs conductive substrate based on Au–Au are selected to produce a mechanically stronger contact with a higher thermal conductivity.
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Original Russian Text © R.A. Khabibullin, N.V. Shchavruk, A.N. Klochkov, I.A. Glinskiy, N.V. Zenchenko, D.S. Ponomarev, P.P. Maltsev, A.A. Zaycev, F.I. Zubov, A.E. Zhukov, G.E. Cirlin, Zh.I. Alferov, 2017, published in Fizika i Tekhnika Poluprovodnikov, 2017, Vol. 51, No. 4, pp. 540–546.
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Khabibullin, R.A., Shchavruk, N.V., Klochkov, A.N. et al. Energy spectrum and thermal properties of a terahertz quantum-cascade laser based on the resonant-phonon depopulation scheme. Semiconductors 51, 514–519 (2017). https://doi.org/10.1134/S106378261704008X
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DOI: https://doi.org/10.1134/S106378261704008X