Anisotropy-induced photonic bound states in the continuum

Abstract

Bound states in the continuum (BICs) are radiationless localized states embedded in the part of the parameter space that otherwise corresponds to radiative modes. Many decades after their original prediction and early observations in acoustic systems, such states have been demonstrated recently in photonic structures with engineered geometries. Here, we put forward a mechanism, based on waveguiding structures that contain anisotropic birefringent materials, that affords the existence of BICs with fundamentally new properties. In particular, anisotropy-induced BICs may exist in symmetric as well as in asymmetric geometries; they form in tunable angular propagation directions; their polarization may be pure transverse electric, pure transverse magnetic or full vector with tunable polarization hybridity; and they may be the only possible bound states of properly designed structures, and thus appear as a discrete, isolated bound state embedded in a whole sea of radiative states.

15 pages, 3 figures

References in corpus (1)

• Topological nature of bound states in the radiation continuum

Cited by in corpus (36)

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• Fabry-Perot Bound States in the Continuum in an Anisotropic Photonic Crystal
• Angular Control of Anisotropy-Induced Bound States in the Continuum
• Unidirectional guided resonances in anisotropic waveguides
• Bound States in the Continuum in Spin-Orbit Coupled Atomic Systems
• Bound states with complex frequencies near the continuum on lossy periodic structures
• Transition from Dirac points to exceptional points in anisotropic waveguides
• Dirac Points Embedded in the Continuum
• Parametric Dependence of Bound States in the Continuum on Periodic Structures
• Parametric dependence of bound states in the continuum in periodic structures: vectorial cases
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• From zero transmission to trapped modes in waveguides
• Bound state in the continuum in an anisotropic photonic crystal supported by full-wave phase plate
• Anisotropy-induced Extrinsic Chirality and Chiral Discrimination of Surface Plasmon Polaritons
• Topological Floquet bound states in the continuum
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• Frequency perturbation theory of bound states in the continuum in a periodic waveguide
• Surface Bound States in the Continuum in Dyakonov Structures