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- Title
Modes Trimming and Clustering in a Weakly Perturbed High‐Q Whispering Gallery Microresonator.
- Authors
Fu, Botao; Gao, Renhong; Lin, Jintian; Yao, Ni; Zhang, Haisu; Wang, Min; Qiao, Lingling; Fang, Wei; Cheng, Ya
- Abstract
In general, a high‐quality (Q) microresonator can accommodate abundant whispering gallery modes (WGMs) with the mode number increasing with the dimensional sizes of the microresonator. Removing the unnecessary modes while reorganizing the remaining modes is of vital importance, which, however, has been proved challenging and usually results in a tradeoff with the Q of the microresonator. Here, an effective and controllable mode trimming and clustering mechanism is revealed underlying the generation of polygon and star modes in weakly perturbed tapered fiber‐coupled lithium niobate whispering gallery microresonators. Experimentally, various polygon and star modes are observed in sequence within a single microresonator by tuning the excitation wavelength or varying the coupling position between a tapered fiber and the circular microresonator, which can be well reproduced with the theoretical model. The finding offers a ubiquitous solution for a broad range of applications requiring elaborate selection and organization of the high‐Q WGMs.
- Subjects
WHISPERING gallery modes; LITHIUM niobate; POLYGONS
- Publication
Laser & Photonics Reviews, 2023, Vol 17, Issue 11, p1
- ISSN
1863-8880
- Publication type
Article
- DOI
10.1002/lpor.202300116