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복잡계 이론물리 연구단
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Transformation cavities with a narrow refractive index profile

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Title
Transformation cavities with a narrow refractive index profile
Author(s)
Jung-Wan Ryu; Jinhang Cho
Publication Date
2021-04
Journal
Optics Letters, v.46, no.8, pp.1900 - 1903
Publisher
The Optical Society
Abstract
© 2021 Optical Society of America.Recently, gradient index cavities, or so-called transformation cavities, designed by conformal transformation optics, have been studied to support resonant modes with both high Q-factors and emission directionality. We propose a new, to the best of our knowledge, design method for transformation cavities to realize a narrower width of the refractive index profile, a great advantage in experimental implementations, without losing the benefits of conformal mapping. We study resonant modes with both high Q-factors and directional emission in newly designed transformation cavities, where the refractive index profile is 50% narrower than in previously proposed transformation cavities. By varying a system parameter with a fixed maximal value of the refractive index profile inside the cavity, the width of the refractive index profile narrows, the Q-factors become higher, and the near and far field patterns maintain their properties, namely, conformal whispering gallery modes and bidirectional emission, respectively.
URI
https://pr.ibs.re.kr/handle/8788114/9913
DOI
10.1364/OL.422529
ISSN
0146-9592
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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