Low-Threshold Surface-Emitting Whispering-Gallery Mode Microlasers

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 reali...

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Bibliographic Details
Published in:arXiv.org 2024-07
Main Authors: Babichev, Andrey, Makhov, Ivan, Kryzhanovskaya, Natalia, Troshkov, Sergey, Zadiranov, Yuriy, Salii, Yulia, Kulagina, Marina, Bobrov, Mikhail, Vasilev, Alexey, Blokhin, Sergey, Maleev, Nikolay, Karachinsky, Leonid, Novikov, Innokenty, Egorov, Anton
Format: Article
Language:English
Subjects:
Bragg reflectors
Excitation
Lasing
Microlasers
Whispering gallery modes
Online Access:Get full text
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Summary: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.
ISSN:2331-8422