Optimization of conformal whispering gallery modes in limaçon-shaped transformation cavities

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Title
Optimization of conformal whispering gallery modes in limaçon-shaped transformation cavities
Author(s)
Jung-Wan Ryu; Cho J.; Kim I.; Choi M.
Publication Date
2019-06
Journal
SCIENTIFIC REPORTS, v.9, no.1, pp.8506 -
Publisher
NATURE PUBLISHING GROUP
Abstract
© 2019, The Author(s).Directional light emission from high-Q resonant modes without significant Q-spoiling has been a long standing issue in deformed dielectric cavities. In limaçon-shaped gradient index dielectric cavities recently proposed by exploiting conformal transformation optics, the variation of Q-factors and emission directionality of resonant modes was traced in their system parameter space. For these cavities, their boundary shapes and refractive index profiles are determined in each case by a chosen conformal mapping which is taken as a coordinate transformation. Through the numerical exploration, we found that bidirectionality factors of generic high-Q resonant modes are not directly proportional to their Q-factors. The optimal system parameters for the coexistence of strong bidirectionality and a high Q-factor was obtained for anisotropic whispering gallery modes supported by total internal reflection
URI
https://pr.ibs.re.kr/handle/8788114/6165
ISSN
2045-2322
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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