Broadband Chiro‐Optical Effects for Futuristic Meta‐Holographic Displays
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Abstract
Abstract Futuristic holographic displays will essentially require broadband chiro‐optical effects for medical imaging, virtual reality, smart security, and optical encryption. However, conventional metasurfaces cannot provide such on‐chip realization of broadband chiro‐optical effects. Moreover, the simultaneous conversion of amplitude, polarization, and phase (APP) at optical wavelengths to introduce giant chirality has not been realized yet. In this paper, a planar all‐dielectric metasurface is proposed incorporating extra degrees of freedom to comprehend the conversion of APP with broadband chiro‐optical effects in terms of giant asymmetric transmission with maximum efficiency of ≈77% at the wavelength of 567 nm. The underlying mechanism behind induced chiro‐optical effects is also investigated using higher‐order multipolar dielectric resonances. Moreover, experimental validation is performed using the reproduced polarization‐encrypted meta‐holograms at broadband visible wavelengths. This work expands the scope of meta‐nanophotonics with potential applications in bioimaging and polarization‐encrypted displays for healthcare and smart security applications.
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