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arXiv · 2407.02196

Low-Threshold Surface-Emitting Whispering-Gallery Mode Microlasers

Andrey Babichev·Ivan Makhov·Natalia Kryzhanovskaya·Sergey Troshkov·Yuriy Zadiranov·Yulia Salii·Marina Kulagina·Mikhail Bobrov·Alexey Vasilev·Sergey Blokhin·Nikolay Maleev·Leonid Karachinsky·Innokenty Novikov·Anton Egorov
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Abstract

We report on microlasers based on high-quality micropillars with lasing on whispering-gallery modes. Usage of low-absorbing Al$\scriptsize 0.2$Ga$\scriptsize 0.8$As\Al$\scriptsize 0.9$Ga$\scriptsize 0.1$As distributed Bragg reflectors as well as the smooth pillar sidewalls allows us to realize whispering-gallery modes lasing by excitation and collection of emission in the pillar axis direction. As a result, simultaneous whispering gallery modes lasing (comb-like structure) in the wavelength range of 930-970 nm is observed for 3-7 $\mu$m pillar diameters. Increase the temperature up to 130 K results single-mode lasing for 5 $\mu$m pillars with about 8000 cold cavity quality-factor and 240 $\mu$W estimated threshold excitation power.

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Andrey Babichev, Ivan Makhov, Natalia Kryzhanovskaya, Sergey Troshkov, Yuriy Zadiranov, Yulia Salii, Marina Kulagina, Mikhail Bobrov, Alexey Vasilev, Sergey Blokhin, Nikolay Maleev, Leonid Karachinsky, Innokenty Novikov, Anton Egorov. 2024-07-02. Low-Threshold Surface-Emitting Whispering-Gallery Mode Microlasers. https://doi.org/10.1109/jstqe.2024.3503724

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