Open AccessOptofluidic microbubble Fabry–Pérot cavity
Author(s) -
Xiaogang Chen,
Xuyang Zhao,
Zhihe Guo,
Liang Fu,
Qiwei Lu,
Shusen Xie,
Xiang Wu
Publication year - 2020
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.392728
Subject(s) - optics , materials science , lasing threshold , refractive index , tilt (camera) , optical cavity , laser , optoelectronics , physics , mechanical engineering , engineering
An optofluidic microbubble Fabry-Pérot (OMBFP) cavity was investigated. In contrast to plane-plane FP (PPFP) cavities, the optical mode confinement and stability in an OMBFP were significantly enhanced. The optical properties of the OMBFP cavity, including the quality (Q) factor, effective mode area, mode distribution as a function of the core refractive index, microbubble position, and mirror tilt angle, were investigated systematically using the finite element method. In optofluidic lasing experiments, a low lasing threshold of 1.25 µJ/mm 2 , which was one order magnitude lower than that of the PPFP, was achieved owing to improved modal lateral confinement. Since the microbubble acts as a micro-lens and microfluidic channel in the parallel FP cavity, mode selection and cell-dye laser were easily realized in the OMBFP cavity.