Photosensitive chalcogenide metasurfaces supporting bound states in the continuum

Abstract

We study, both theoretically and experimentally, tunable metasurfaces supporting sharp Fano-resonances inspired by optical bound states in the continuum. We explore the use of arsenic trisulfide (a photosensitive chalcogenide glass) having optical properties which can be finely tuned by light absorption at the post-fabrication stage. We select the resonant wavelength of the metasurface corresponding to the energy below the arsenic trisulfide bandgap, and experimentally control the resonance spectral position via exposure to the light of energies above the bandgap.

arXiv comment7 pages, 5 figures

References in corpus (5)

• Asymmetric metasurfaces with high-$Q$ resonances governed by bound states in the continuum
• High-Q supercavity modes in subwavelength dielectric resonators
• Nonlinear metasurfaces governed by bound states in the continuum
• Nonradiating Photonics with Resonant Dielectric Nanostructures
• Strong coupling between excitons in transition metal dichalcogenides and optical bound states in the continuum

Cited by in corpus (6)

• Applications of Bound States in the Continuum in Photonics
• Low Threshold Bound State in the Continuum Lasers in Hybrid Lattice Resonance Metasurfaces
• Bound states in the continuum in photonic structures
• Imaging through Fano-resonant dielectric metasurface governed by quasi-BIC
• Strong coupling between excitons and magnetic dipole quasi-bound states in the continuum in WS${}_2$-TiO${}_2$ hybrid metasurfaces
• Interaction-induced multiparticle bound states in the continuum