137 citations · 768 across the 45 of their papers we have counts for
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Localization in microcavities revealed by phase-space non-Hermitian skin effect
Jung-Wan Ryu, Yong-Hoon Lee, Muhan Choi +2
Contrary to the semiclassical expectation for fully chaotic systems, localization of resonances is found to be a common feature in open microcavities. In spiral-shaped dielectric m…
Comment on "Amplified emission and lasing in photonic time crystals"
Jagang Park, Hee Chul Park, Kyungmin Lee +5
Lyubarov et al. (Research Articles, 22 July 2022, p. 425) claim that the spontaneous emission rate of an atom vanishes at the momentum gap edges of photonic Floquet media. We show…
Double layered transformation cavities: Crossover between local and global transformations
Jung-Wan Ryu
We study the resonant modes in double-layered transformation cavities consisting of inner and outer layer boundaries where the mode intensity is mainly located inside the inner lay…
Classification of multiple arbitrary-order non-Hermitian singularities
Jung-Wan Ryu, Jae-Ho Han, Chang-Hwan Yi
We demonstrate general classifications of Riemann surface topology generated by multiple arbitrary-order exceptional points of quasi-stationary states. Our studies reveal all possi…
Transformation cavities with a narrow refractive index profile
Jung-Wan Ryu, Jinhang Cho
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-fa…
Circle-shaped Transformation Cavity via Center-Shift Möbius Transfomation
Jinhang Cho, Inbo Kim, Sunghwan Rim +3
Circle-shaped transformation cavities of shifted center are the most simple transformation cavities in the sense that they have only spatial index variation without boundary shape…