Polarization‐Multiplexed Silicon Metasurfaces for Multi‐Channel Visible Light Modulation

Abstract

All-dielectric metasurfaces with low-loss planar photonic subwavelength elements can be freely designed to realize high-efficiency light wave manipulation. It is highly desirable to achieve multifunctionalities with a single metasurface to further enrich the manipulation of light with metasurfaces for diverse applications. This article demonstrates multifunctional silicon-based metasurfaces capable of generating versatile wavefronts under different polarization light incidence at visible wavelengths. The polarization-multiplexed metasurfaces are implemented with rationally arranged anisotropic silicon nanobricks to achieve independent control of orthogonal linearly polarized light waves for multi-channel functionalities, including polarized beam splitting, opposite charged and different ordered optical vortexes. The polarizationmultiplexed high-quality silicon metasurfaces have great potential for applications in multi-channel optical devices with integrated functionality.

Manipulation of Fractal Nano‐Kirigami by Capillary and Electrostatic Forces

“…Meaningfully, the fractal nano-kirigami can be employed to generate OVs with the fractal-dependent light field distributions. Compared to existing schemes that build gradient phase regions by fabricating large-area metasurface array, [41][42][43] our strategy provides a convenient and efficient approach. Therefore, this work opens an new avenue for designing tunable photonic metastructures with richful fractals, and the proposed fractal nano-kirigami strategy provides a novel platform for the innovative design and fabrication of functional photonic micro/nano structures.…”

“…Significantly, such strategy with single structure is much convenient and efficient compared to the OV scheme by fabricating largearea metasurface arrays. [41][42][43] This fractal-dependent OV regulation mechanism provides a favorable platform for customized manipulation of light fields, and it is expected to have potential applications in light field multiplexing and photonic encoding.…”

High-efficiency modulation of broadband polarization conversion with a reconfigurable chiral metasurface

“…Optical/electromagnetic metasurfaces are artificial thin-layered structures composed of sub-wavelength resonant meta-cells, and with them, the transmission, polarization, phase, and complex wavefront of electromagnetic waves can be freely tuned by properly designing the unit structures and their spatial arrangements. 7–16…”

“…Optical/electromagnetic metasurfaces are articial thin-layered structures composed of subwavelength resonant meta-cells, and with them, the transmission, polarization, phase, and complex wavefront of electromagnetic waves can be freely tuned by properly designing the unit structures and their spatial arrangements. [7][8][9][10][11][12][13][14][15][16] The metasurface has been exploited for high-performance anisotropic and even chiral optics for its arbitrarily designed microstructure with superiority in achieving enhanced anisotropic scatterings of the vectorial components of electromagnetic waves. [17][18][19][20][21][22][23][24][25][26][27][28][29][30] It has been demonstrated as an excellent platform for high efficiency polarization control devices with ultrathin or subwavelength dimensions overcoming the conventional devices with macroscopic geometries.…”

Multiple linear-crossing metamaterials for directional refraction

“…Similar to the Fermi plane in electronic systems, the IFCs of photonic systems determine the transmission properties of light in various materials (Guo et al, 2020a). The complex dispersive control of beam propagation is a very interesting topic (Fan et al, 2016;Tsilipakos et al, 2018;Zhu et al, 2022). It is well known that the normal topological transition of dispersion in anisotropic metamaterials, in which IFC changes from a closed ellipsoid to an open hyperboloid, can lead to many unusual propagation phenomena of electromagnetic waves in media, such as all-angle negative refraction (High et al, 2015), focusing (Martín-Sánchez et al, 2021), and self-collimation (Yu et al, 2016).…”