{"title":"Fundamental Mode Selection in Spherical Microresonator Using a Thin Metal Film with a Gap","authors":"H. A. Rizk, V. A. Simonov, V. S. Terentyev","doi":"10.3103/S1068335624602693","DOIUrl":null,"url":null,"abstract":"<p>Using numerical simulation in COMSOL Multiphysics software we demonstrate for the first time the possibility of selecting a fundamental whispering gallery mode in a spherical microresonator with a radius of 80 μm based on the absorption effect in a thin metal film with a gap located at some distance from the resonator surface. Q-factors of radial and azimuthal modes were calculated for modes with the azimuthal index <i>m</i> = 455. The results showed a high Q-factor ≈ 10<sup>9</sup> of the fundamental mode including to internal loss and the possibility of ~100-times and 10-times suppression with a 5-nm layer of the Q-factor of higher radial and azimuthal modes, respectively. In addition, the paper shows the possibility of using this method for selecting the fundamental mode in a wide range of index <i>m</i> values while maintaining high Q-factor and suppression factor of higher modes.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":"51 10 supplement","pages":"S826 - S833"},"PeriodicalIF":0.6000,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Lebedev Physics Institute","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.3103/S1068335624602693","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Using numerical simulation in COMSOL Multiphysics software we demonstrate for the first time the possibility of selecting a fundamental whispering gallery mode in a spherical microresonator with a radius of 80 μm based on the absorption effect in a thin metal film with a gap located at some distance from the resonator surface. Q-factors of radial and azimuthal modes were calculated for modes with the azimuthal index m = 455. The results showed a high Q-factor ≈ 109 of the fundamental mode including to internal loss and the possibility of ~100-times and 10-times suppression with a 5-nm layer of the Q-factor of higher radial and azimuthal modes, respectively. In addition, the paper shows the possibility of using this method for selecting the fundamental mode in a wide range of index m values while maintaining high Q-factor and suppression factor of higher modes.
期刊介绍:
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.