Metal–dielectric mirror coatings for 4–5-μm quantum-cascade lasers

By | 15.09.2024
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K. A. Podgaetskii, A. V. Lobintsov, A. I. Danilov, A. V. Ivanov, M. A. Ladugin, A. A. Marmalyuk, E. V. Kuznetsov, V. V. Dyudelev, D. A. Mikhailov, D. V. Chistyakov, A. V. Babichev, E. A. Kognovitskaya, A. V. Lyutetskiy, S. O. Slipchenko, N. A. Pikhtin, A. G. Gladyshev, I. I. Novikov, L. Ya. Karachinsky, A. Yu. Egorov, G. S. Sokolovskii

  • Polyus Research and Development Institute named after M. F. Stel’makh, 117342, Moscow, Russia
  • Peoples’ Friendship University of Russia named after Patrice Lumumba, 117198, Moscow, Russia
  • National Research Nuclear University MEPhI, 115409, Moscow, Russia
  • Ioffe Institute, Russian Academy of Sciences, 194021, St. Petersburg, Russia
  • Connector Optics LLC, 194292, St. Petersburg, Russia
  • ITMO University, 197101, St. Petersburg, Russia
  • Alferov St. Petersburg National Research Academic University of the Russian Academy of Sciences, 194021, St. Petersburg, Russia

The development of mirror coatings was performed within the framework of the Competitiveness Enhancement Program of the National Research Nuclear University MEPhI (project no. 02.a03.21.0005). Experimental studies of QCLs were supported by the Russian Science Foundation (project no. 21-72-30020).

 

Abstract: We report the results of a comparison of metal–dielectric mirror coatings for mid-IR quantum-cascade lasers (QCLs). Samples of QCLs with Al2O3/Ti/Au and SiO2/Ti/Au optical coatings are fabricated and their characteristics are studied. It is shown that the use of metal–dielectric mirror coatings allows the output optical power of devices to be increased up to 93% and their threshold currents to be reduced by 1.25 times.
Keywords: quantum-cascade laser, highly reflective mirrors, output power, IR range.
Received: 13.07.2023