Broadband Chiro‐Optical Effects for Futuristic Meta‐Holographic Displays

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.

Meta-Mirror with Enhanced Circular Dichroism using Chiral Metasurface

“…The careful selection of the optimal values for the structure provides the required results for maximum CD at the multiband NIR wavelengths. Hydrogenated amorphous silicon is used to design the structure with high refractive index and negligible extinction coefficient [59].…”

Notice of Removal & Expression of Concern "Conventional Planar Chiral Structures to Realize Meta-Mirror with Polarization Conservation and Circular Dichroism"

“…A lot of meta-reflectors and amplifies based on metals have also been presented in the literature [55][56][57]. Recently, Mai et al has demonstrated a 3D structure to reflect one handedness of circularly polarized light and absorbing the opposite handedness [58]. Moreover, to avoid the complex fabrication procedures, few works reported on single layer structures to design meta-mirror [59][60].…”

Highly Efficient Perfect Vortex Beams Generation Based on All-Dielectric Metasurface for Ultraviolet Light

“…The nanoscale thickness and planar footprints of metasurfaces enable their fabrication using single-step lithography technologies and allow them to take full advantage of mature semiconductor industries. So far, the research community has demonstrated numerous high-performance metasurfaces exhibiting a chain of functionalities including beam shaping [26], high-resolution imaging [27][28][29], metaabsorbers [30][31][32][33], asymmetric light transmission [34][35][36][37], hologram projection [38][39][40][41][42][43][44], and structured light generation [45][46][47][48][49][50][51][52][53][54].…”