Surface lasing in micropillar cavity lasers

A. V. Babichev^a, I. S. Makhov^b, N. V. Kryzhanovskaya^b, Yu. M. Zadiranov^a, J. A. Salii^a, M. M. Kulagina^a, Ya. N. Kovach^ac, M. A. Bobrov^a, A. P. Vasil'ev^a, S. A. Blokhin^a, N. A. Maleev^a, L. Ya. Karachinsky^c, I. I. Novikov^c, A. Yu. Egorov<sup>c

a</sup> Ioffe Institute, St. Petersburg
^b National Research University "Higher School of Economics", St. Petersburg Branch
^c St. Petersburg National Research University of Information Technologies, Mechanics and Optics

Abstract: Lasing in vertical micropillar cavity lasers at a temperature of 244 K was demonstrated. The threshold absorbed optical power, lasing wavelength and quality factor of a 4 $\mu$m diameter micropillar laser were $\sim$2.8 mW, 989 nm and 12000. The minimum threshold absorbed optical power (250 $\mu$W) corresponds to a temperature of 168 K.

Keywords: microlasers, vertical microcavity, quantum dots, Stranski–Krastanov mechanism, optical reservoir computing.

Received: 14.07.2025
Revised: 06.08.2025
Accepted: 11.08.2025

DOI: 10.61011/PJTF.2025.21.61531.20443

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