Circularly polarized states spawning from bound states in the continuum

Abstract

Bound states in the continuum in periodic photonic systems like photonic crystal slabs are proved to be accompanied by vortex polarization singularities on the photonic bands in the momentum space. The winding structures of polarization states not only widen the field of topological physics but also show great potential that such systems could be applied in polarization manipulating. In this work, we report the phenomenon that by in-plane inversion ($C_2$) symmetry breaking, pairs of circularly polarized states could spawn from the eliminated Bound states in the continuum. Along with the appearance of the circularly polarized states as the two poles of the Poincaré sphere together with linearly polarized states covering the equator, full coverage on the Poincaré sphere could be realized. As an application, ellipticity modulation of linear polarization is demonstrated in the visible frequency range. This phenomenon provides new degree of freedom in modulating polarization.

arXiv comment5 pages, 5 figures

References in corpus (12)

• Spin-orbit interactions of light
• Asymmetric metasurfaces with high-$Q$ resonances governed by bound states in the continuum
• Topological nature of bound states in the radiation continuum
• Observation of Bulk Fermi Arc and Polarization Half Charge from Paired Exceptional Points
• Nonradiating Photonics with Resonant Dielectric Nanostructures
• Analytical Perspective for Photonic Bound States in the Continuum in Photonic Crystal Slabs
• Observation of optical vortices in momentum space
• Singularities and Poincaré Indexes of Electromagnetic Multipoles
• Bound states in the continuum through environmental design
• Topological features of vector vortex beams perturbed with uniformly polarized light
• Polarization control of quantum dot emission by chiral photonic crystal slabs
• Valley vortex states and degeneracy lifting via photonic higher-band excitation

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