Kangyong Hu, Jingtong Duan, Yameng Xu, Xin Liu, Mei Kong
{"title":"Model and effect of backscattering on mode splitting in optical circular cavity","authors":"Kangyong Hu, Jingtong Duan, Yameng Xu, Xin Liu, Mei Kong","doi":"10.1016/j.photonics.2025.101420","DOIUrl":null,"url":null,"abstract":"<div><div>In optical circular cavities, backscattering due to refractive index inhomogeneity and sidewall roughness can cause degenerate resonant modes to split. In this paper, a steady-state field model for circular cavities with backscattering is established and solved. The splitting conditions of the reflection and the transmission spectra and for obvious splitting are discussed. The proposed analytical model and the obtained mode splitting conditions are concise and feasible, which will provide great convenience to the evaluation or anticipation of the backscattering-induced mode splitting. The insights provided by this paper will also serve as a valuable reference for circular resonators of other configurations.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101420"},"PeriodicalIF":2.5000,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Photonics and Nanostructures-Fundamentals and Applications","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1569441025000707","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
In optical circular cavities, backscattering due to refractive index inhomogeneity and sidewall roughness can cause degenerate resonant modes to split. In this paper, a steady-state field model for circular cavities with backscattering is established and solved. The splitting conditions of the reflection and the transmission spectra and for obvious splitting are discussed. The proposed analytical model and the obtained mode splitting conditions are concise and feasible, which will provide great convenience to the evaluation or anticipation of the backscattering-induced mode splitting. The insights provided by this paper will also serve as a valuable reference for circular resonators of other configurations.
期刊介绍:
This journal establishes a dedicated channel for physicists, material scientists, chemists, engineers and computer scientists who are interested in photonics and nanostructures, and especially in research related to photonic crystals, photonic band gaps and metamaterials. The Journal sheds light on the latest developments in this growing field of science that will see the emergence of faster telecommunications and ultimately computers that use light instead of electrons to connect components.