Fundamental Mode Selection in Spherical Microresonator Using a Thin Metal Film with a Gap

IF 0.6 4区 物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY Bulletin of the Lebedev Physics Institute Pub Date : 2025-02-15 DOI:10.3103/S1068335624602693
H. A. Rizk, V. A. Simonov, V. S. Terentyev
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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.

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来源期刊
Bulletin of the Lebedev Physics Institute
Bulletin of the Lebedev Physics Institute PHYSICS, MULTIDISCIPLINARY-
CiteScore
0.70
自引率
25.00%
发文量
41
审稿时长
6-12 weeks
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.
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