激光阈值
光电子学
材料科学
微透镜
光学
Q系数
塞尔效应
低语长廊波浪
激光器
谐振器
物理
自发辐射
镜头(地质)
作者
Shuangshuang Tian,Qi Wang,Shuang Liang,Qi Han,Debao Zhang,Zhongmin Huang,Jiqiang Ning,Shiliang Mei,Wei Xie,Haibin Zhao,Xiang Wu,Jun Wang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2024-01-16
卷期号:24 (4): 1406-1414
标识
DOI:10.1021/acs.nanolett.3c04797
摘要
The realization of high-Q single-mode lasing on the microscale is significant for the advancement of on-chip integrated light sources. It remains a challenging trade-off between Q-factor enhancement and light-field localization to raise the lasing emission rate. Here, we fabricated a zero-dimensional perovskite microcavity integrated with a nondamage pressed microlens to three-dimensionally tailor the intracavity light field and demonstrated linearly and nonlinearly (two-photon) pumped lasing by this microfocusing configuration. Notably, the microlensing microcavity experimentally achieves a high Q-factor (16700), high polarization (99.6%), and high Purcell factor (11.40) single-mode lasing under high-repetition pulse pumping. Three-dimensional light-field confinement formed by the microlens and plate microcavity simultaneously reduces the mode volume (∼3.66 μm3) and suppresses diffraction and transverse walk-off loss, which induces discretization on energy-momentum dispersions and spatial electromagnetic-field distributions. The Q factor and Purcell factor of our lasing come out on top among most of the reported perovskite microcavities, paving a promising avenue toward further studying electrically driven on-chip microlasers.
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