Directional output emission from ring microlasers with broken rotational symmetry
Masyutin D. A.
1, Moiseev E.I.
1, Komarov S.D.
1, Mintairov S.A.
2,3, Kalyuzhnyy N.A.
2,3, Saliy Yu.A.
2, Kulagina M.M.
2, Zubov. F.I.
3, Khabibullin R.A.
4, Galiev R.R.
4, Pavlov A.Yu.
4, Tomosh K.N.
4, Kryzhanovskaya N.V.
1, Zhukov A.E.
11HSE University, St. Petersburg, Russia
2Ioffe Institute, St. Petersburg, Russia
3Alferov Federal State Budgetary Institution of Higher Education and Science Saint Petersburg National Research Academic University of the Russian Academy of Sciences, St. Petersburg, Russia
4National Research Center “Kurchatov Institute”, Moscow, Russia
Email: dmasyutin@hse.ru, emoiseev@hse.ru
Injection semiconductor microlasers with a 15 μm-radius ring resonator and an asymmetrically positioned internal resonator aperture are studied. It is shown that the asymmetry results in the formation of two directional radiation lobes in the radiation pattern, misaligned by 50 degrees relative to the internal aperture's offset axis. The measured Q-factor of the resonators is comparable to that of disk resonators and is at a level of ~ 106. Keywords: microlasers, ring resonator, InGaAs/GaAs quantum dots, directed emission, quality factor.
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