Low-Threshold Surface-Emitting Whispering-Gallery Mode Microlasers

作者：Andrey V Babichev, Ivan S. Makhov, N. V. Kryzhanovskaya, Sergey I. Troshkov, Yuriy Zadiranov, Yulia Salii, Marina M Kulagina, Mikhail A. Bobrov, Alexey Vasil'ev, Sergey A. Blokhin, Nikolay A. Maleev, Leonid Ya. Karachinsky, I. I. Novikov, Anton Yu. Egorov · 发表于：IEEE Journal of Selected Topics in Quantum Electronics · 年份：2024 · DOI：10.1109/jstqe.2024.3503724 · 被引用次数：5 · 研究领域：Photonic and Optical Devices、Semiconductor Lasers and Optical Devices、Molecular Junctions and Nanostructures

We report on microlasers based on high-quality micropillars with whispering-gallery modes lasing. The use of low-absorbing Al0.2Ga0.8As/Al0.9Ga0.1As distributed Bragg reflectors and smooth pillar sidewalls enables whispering-gallery modes lasing by excitation and collection of emission in the pillar axis direction. Simultaneous whispering gallery modes lasing (comb-like structure) is observed in the wavelength range of 930–970 nm for 3–7 μm pillar diameters. Increasing the temperature to 130 K leads to single-mode lasing for 5 μm pillars with a cold cavity quality-factor of about 8000 and an estimated threshold excitation power of 240 μW. Lasing in the thermoelectrical cooling range (up to 170 K) has been demonstrated.