Formation mechanism of guided resonances and bound states in the continuum in photonic crystal slabs
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Formation mechanism.pdf
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Author(s)
Gao, Xingwei
Chen, Hongsheng
Hsu, Chia Wei
Zhen, Bo
Lin, Xiao
Joannopoulos, John
Soljacic, Marin
Date Issued
August 2016
Journal
Scientific Reports
Publisher
Nature Publishing Group
Citation
Gao, Xingwei et al. “Formation Mechanism of Guided Resonances and Bound States in the Continuum in Photonic Crystal Slabs.” Scientific Reports 6.1 (2016): n. pag.
Version
Final published version
Abstract
We develop a formalism, based on the mode expansion method, to describe the guided resonances and bound states in the continuum (BICs) in photonic crystal slabs with one-dimensional periodicity. This approach provides analytic insights to the formation mechanisms of these states: the guided resonances arise from the transverse Fabry–Pérot condition, and the divergence of the resonance lifetimes at the BICs is explained by a destructive interference of radiation from different propagating components inside the slab. We show BICs at the center and on the edge of the Brillouin zone protected by symmetry, BICs at generic wave vectors not protected by symmetry, and the annihilation of BICs at low-symmetry wave vectors.
MIT Department
Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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Creative Commons Attribution 4.0 International License
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DOI of Published Version
https://doi.org/10.1038/srep31908
