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    • Maximization of a Frequency Splitting on Continuous Exceptional Points in Asymmetric Optical Microdisks

    H. Y. U. N. D. O. N. G. KIM, S. U. N. J. A. E. GWAK,H. Y. E. O. N. -HYE YU,J. I. N. H. Y. E. O. K. RYU,CHIL-MIN KIM,CHANG-HWAN YI

    OPTICS EXPRESS（2023）

    DGIST

    Cited 3|Views6
    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)10.1103/PhysRevResearch.4.023121] 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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    Exceptional Points
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