Topological Nature of Optical Bound States in the Continuum
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PhysRevLett.113.257401.pdf
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Author(s)
Zhen, Bo
Hsu, Chia Wei
Lu, Ling
Stone, A. Douglas
Soljacic, Marin
Date Issued
December 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Zhen, Bo, et al. "Topological Nature of Optical Bound States in the Continuum." Phys. Rev. Lett. 113, 257401 (December 2014). © 2014 American Physical Society
Version
Final published version
Abstract
Optical bound states in the continuum (BICs) have recently been realized in photonic crystal slabs, where the disappearance of out-of-plane radiation turns leaky resonances into guided modes with infinite lifetimes. We show that such BICs are vortex centers in the polarization directions of far-field radiation. They carry conserved and quantized topological charges, defined by the winding number of the polarization vectors, which ensure their robust existence and govern their generation, evolution, and annihilation. Our findings connect robust BICs in photonics to a wide range of topological physical phenomena.
MIT Department
Massachusetts Institute of Technology. Materials Processing Center
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Research Laboratory of Electronics
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.113.257401
