Maximization of a frequency splitting on continuous exceptional points in asymmetric optical microdisks

Hyundong Kim; Sunjae Gwak; Hyeon Hye Yu; Jinhyeok Ryu; Chil Min Kim; Chang Hwan Yi

doi:10.1364/OE.484812

Maximization of a frequency splitting on continuous exceptional points in asymmetric optical microdisks

Hyundong Kim, Sunjae Gwak, Hyeon Hye Yu, Jinhyeok Ryu, Chil Min Kim, Chang Hwan Yi

Department of Physics and Chemistry

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

We study a systematic formation of continuous exceptional points (EPs) in a fully-asymmetric optical microdisk. A parametric generation of chiral EP modes is investigated by analyzing asymmetricity-dependent coupling elements in an effective Hamiltonian. It is shown that given the external perturbation, the frequency splitting around EPs is scaled by the fundamental “strength” of EPs [J. Wiersig, Phys. Rev. Res. 4, 023121 (2022)] multiplied by the extra responding strength of the newly added perturbation. Our finding demonstrates that the sensitivity of EP-based sensors can be maximized by carefully examining the continuous formation of EPs.

Original language	English
Pages (from-to)	12634-12644
Number of pages	11
Journal	Optics Express
Volume	31
Issue number	8
DOIs	https://doi.org/10.1364/OE.484812
State	Published - 10 Apr 2023

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© 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

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title = "Maximization of a frequency splitting on continuous exceptional points in asymmetric optical microdisks",

abstract = "We study a systematic formation of continuous exceptional points (EPs) in a fully-asymmetric optical microdisk. A parametric generation of chiral EP modes is investigated by analyzing asymmetricity-dependent coupling elements in an effective Hamiltonian. It is shown that given the external perturbation, the frequency splitting around EPs is scaled by the fundamental “strength” of EPs [J. Wiersig, Phys. Rev. Res. 4, 023121 (2022)] multiplied by the extra responding strength of the newly added perturbation. Our finding demonstrates that the sensitivity of EP-based sensors can be maximized by carefully examining the continuous formation of EPs.",

author = "Hyundong Kim and Sunjae Gwak and Yu, {Hyeon Hye} and Jinhyeok Ryu and Kim, {Chil Min} and Yi, {Chang Hwan}",

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AU - Kim, Hyundong

AU - Gwak, Sunjae

AU - Yu, Hyeon Hye

AU - Ryu, Jinhyeok

AU - Kim, Chil Min

AU - Yi, Chang Hwan

PY - 2023/4/10

Y1 - 2023/4/10

N2 - We study a systematic formation of continuous exceptional points (EPs) in a fully-asymmetric optical microdisk. A parametric generation of chiral EP modes is investigated by analyzing asymmetricity-dependent coupling elements in an effective Hamiltonian. It is shown that given the external perturbation, the frequency splitting around EPs is scaled by the fundamental “strength” of EPs [J. Wiersig, Phys. Rev. Res. 4, 023121 (2022)] multiplied by the extra responding strength of the newly added perturbation. Our finding demonstrates that the sensitivity of EP-based sensors can be maximized by carefully examining the continuous formation of EPs.

AB - We study a systematic formation of continuous exceptional points (EPs) in a fully-asymmetric optical microdisk. A parametric generation of chiral EP modes is investigated by analyzing asymmetricity-dependent coupling elements in an effective Hamiltonian. It is shown that given the external perturbation, the frequency splitting around EPs is scaled by the fundamental “strength” of EPs [J. Wiersig, Phys. Rev. Res. 4, 023121 (2022)] multiplied by the extra responding strength of the newly added perturbation. Our finding demonstrates that the sensitivity of EP-based sensors can be maximized by carefully examining the continuous formation of EPs.

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JO - Optics Express

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Maximization of a frequency splitting on continuous exceptional points in asymmetric optical microdisks

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