Point-Defect-Localized Bound States in the Continuum in Photonic Crystals and Structured Fibers
arXiv:2102.01342 · doi:10.1103/PhysRevLett.127.023605
Abstract
We show that point defects in two-dimensional photonic crystals can support bound states in the continuum (BICs). The mechanism of confinement is a symmetry mismatch between the defect mode and the Bloch modes of the photonic crystal. These BICs occur in the absence of bandgaps and therefore provide an alternative mechanism to confine light. Furthermore, we show that such BICs can propagate in a fiber geometry and exhibit arbitrarily small group velocity which could serve as a platform for enhancing non-linear effects and light-matter interactions in structured fibers.
arXiv commentManuscript is 5 pages, 3 figures. Supplementary 3 pages, 4 figures
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- Observation of bound states in the continuum embedded in symmetry bandgaps
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- Multiple symmetry protected BIC lines in two dimensional synthetic parameter space
- Fate of Two-Particle Bound States in the Continuum in non-Hermitian Systems
- Tunable Nanophotonic Devices and Cavities based on a Two-Dimensional Magnet
- Observation of Square-Root Higher-Order Topological States in Photonic Waveguide Arrays
- Loss-driven gain enhancements driven by topological singularities in non-Hermitian photonic crystals defects
- Orbital Frontiers: Harnessing Higher Modes in Photonic Simulators