Abstract
The room-temperature generation of multiperiod quantum-cascade lasers (QCL) at a wavelength of 5.8 μm in the pulsed mode is demonstrated. The heterostructure of a quantum-cascade laser based on a heterojunction of InGaAs/InAlAs alloys is grown by molecular-beam epitaxy and incorporates 60 identical cascades. The threshold current density of the stripe laser 1.4 mm long and 22 μm wide is ~4.8 kA/cm2 at a temperature of 303 K. The maximum power of the optical-radiation output from one QCL face, recorded by a detector, is 88 mW. The actual optical-power output from one QCL face is no less than 150 mW. The results obtained and possible ways of optimizing the structure of the developed quantum-cascade lasers are discussed.
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Original Russian Text © A.V. Babichev, A. Bousseksou, N.A. Pikhtin, I.S. Tarasov, E.V. Nikitina, A.N. Sofronov, D.A. Firsov, L.E. Vorobjev, I.I. Novikov, L.Ya. Karachinsky, A.Yu. Egorov, 2016, published in Fizika i Tekhnika Poluprovodnikov, 2016, Vol. 50, No. 10, pp. 1320–1324.
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Babichev, A.V., Bousseksou, A., Pikhtin, N.A. et al. Room-temperature operation of quantum cascade lasers at a wavelength of 5.8 μm. Semiconductors 50, 1299–1303 (2016). https://doi.org/10.1134/S1063782616100067
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DOI: https://doi.org/10.1134/S1063782616100067