Electro-optic lithium niobate metasurfaces for tunable wavefront shaping
2022 Sixteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)(2022)
摘要
We demonstrate electrically tunable lithium niobate metasurfaces based on the electro-optic effect. Asymmetric one-dimensional lithium niobate gratings are designed to support quasi-bound states in the continuum with high quality factor. Thanks to the high spectral selectivity of the quasi-bound state, we can shift the resonant mode with a weak refractive index modulation that results from an applied voltage. At a fixed wavelength, this effect produces a phase shift that can be exploited to electrically address the metasurfaces and dynamically control its local phase response and wavefront.
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关键词
electro-optic lithium niobate metasurfaces,tunable wavefront shaping,electrically tunable lithium niobate metasurfaces,electro-optic effect,one-dimensional lithium niobate gratings,high quality factor,high spectral selectivity,weak refractive index modulation,local phase response
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