Formation mechanism of guided resonances and bound states in the continuum in photonic crystal slabs
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 resonanc...
Main Authors: | , , , , , , |
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Other Authors: | , , |
Format: | Article |
Language: | English |
Published: |
Nature Publishing Group,
2017-04-26T19:54:23Z.
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Subjects: | |
Online Access: | Get fulltext |
Summary: | 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. Massachusetts Institute of Technology. Institute for Soldier Nanotechnologies (Contract W911NF-13-D-0001) United States. Department of Energy. Office of Science. Solid-State Solar Thermal Energy Conversion Center (Grant de-sc0001299) United States-Israel Binational Science Foundation (Award 2013508) National Science Foundation (U.S.) (Grant DMR-1307632) National Natural Science Foundation (China) (Grants 61322501) National Natural Science Foundation (China) (Grants 61574127) National Natural Science Foundation (China) (Grants 61275183) |
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