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Rayleigh scatterer-induced steady exceptional points of stable-island modes in a deformed optical microdisk

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Title
Rayleigh scatterer-induced steady exceptional points of stable-island modes in a deformed optical microdisk
Author(s)
Sunjae Gwak; Kim, Hyundong; Yu, Hyeon-Hye; Ryu, Jinhyeok; Kim, Chil-Min; Chang-Hwan Yi
Subject
LASER
Publication Date
2021-06-15
Journal
OPTICS LETTERS, v.46, no.12, pp.2980 - 2983
Publisher
The Optical Society
Abstract
© 2021 Optical Society of America.A formation of second-order non-Hermitian degeneracies, called exceptional points (EPs), in a chaotic oval-shaped dielectric microdisk is studied. Different symmetric optical modes localized on a stable period-3 orbit coalesce to form chiral EPs. Unlike a circular microdisk perturbed by two scatterers (CTS), our proposed system requires only one scatterer to build chiral EPs. The scatterer positions for counterpropagating EP modes are far distant from one another and almost steady against varying scatterer sizes in contrast to the CTS case. Our results can contribute to establishing a more solid platform for EP-based-device applications with flexibility and easy feasibility in obtaining EPs.
URI
https://pr.ibs.re.kr/handle/8788114/9909
DOI
10.1364/OL.426470
ISSN
0146-9592
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > 1. Journal Papers (저널논문)
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