Topological guided-mode resonances at non-Hermitian nanophotonic interfacesopen access
- Authors
- Lee, Ki Young; Yoo, Kwang Wook; Choi, Youngsun; Kim, Gunpyo; Cheon, Sangmo; Yoon, Jae Woong; Song, Seok Ho
- Issue Date
- May-2021
- Publisher
- WALTER DE GRUYTER GMBH
- Keywords
- guided-mode resonance; non-Hermitian effect; subwavelength grating; topological effect
- Citation
- NANOPHOTONICS, v.10, no.7, pp.1853 - 1860
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANOPHOTONICS
- Volume
- 10
- Number
- 7
- Start Page
- 1853
- End Page
- 1860
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/141983
- DOI
- 10.1515/nanoph-2021-0024
- ISSN
- 2192-8606
- Abstract
- The topological properties of photonic microstructures are of great interest because of their experimental feasibility for fundamental study and potential applications. Here, we show that robust guided-mode-resonance states exist in photonic domain-wall structures whenever the complex photonic band structures involve certain topological correlations in general. Using the non-Hermitian photonic analogy of the one-dimensional Dirac equation, we derive essential conditions for photonic Jackiw-Rebbi-state resonances taking advantage of unique spatial confinement and spot-like spectral features which are remarkably robust against random parametric errors. Therefore, the proposed resonance configuration potentially provides a powerful method to create compact and stable photonic resonators for various applications in practice.
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