Laser-tuned whispering gallery modes in silica micro-bubble resonator integrated with iron oxide particles

• 作者: LIANG Cong-zhou ZHANG Hao WANG Yu-jia WU Ji-xuan LIN Wei LIU Bo LIU Hai-feng
• 来源期刊: 光电子快报（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: Devices
• 页码范围: 129-133
• 页数: 5页
• 语种: 英文
• DOI: 10.1007/s11801-021-0012-y

摘要

A 473-nm-laser-tuned whispering gallery mode(WGM)silica microbubble resonator integrated with iron oxide parti-cles is demonstrated in this paper.Owing to the photo-induced thermal effect,the WGM resonance wavelength could be tuned by adjusting laser power density of the illuminating light absorbed by the iron oxide particles.A wavelength tuning sensitivity of 0.03 nm/(mW·mm-2)and a tuning range of 0.18 nm are experimentally achieved.Moreover,the influence of ambient temperature on the WGM spectral characteristics is experimentally studied,and a sil-ica-microbubble-based reference scheme is demonstrated to compensate for the temperature-caused resonance wave-length variation.The proposed laser-tuned microresonator has great potential in optical modulation and high-precision optical filtering applications.