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Article Abstract
Metasurfaces can freely manipulate the wavefronts of incident beams, making them a highly effective platform for holographic imaging or nanoprinting. However, their on-chip integration is hindered by the need for external light excitation, and the resonant nature of the meta-atoms that compose them presents a challenge for achieving meta-image with super-resolution. In this work, by leveraging the unique dispersion properties of unidirectional guided waves instead of resonant meta-atoms, we introduce a novel approach to realize meta-imaging. We validate this approach through the design of two microwave metasurfaces utilizing metal-air-gyromagnetic unidirectional surface magnetoplasmons (USMPs). The metasurfaces efficiently convert guided waves into an image of the letter "A" and the Greek letter "ϕ" with super-resolution, which is a challenge for conventional meta-imaging. The strategy presented here offers a promising alternative for achieving meta-image displays, thus opening new possibilities for the development of integrated plasmonic networks and devices.
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Metasurfaces can freely manipulate the wavefronts of incident beams, making them a highly effective platform for holographic imaging or nanoprinting. However, their on-chip integration is hindered by the need for external light excitation, and the resonant nature of the meta-atoms that compose them presents a challenge for achieving meta-image with super-resolution. In this work, by leveraging the unique dispersion properties of unidirectional guided waves instead of resonant meta-atoms, we introduce a novel approach to realize meta-imaging.
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View Article and Find Full Text PDFTwofold optical display and encryption of binary and grayscale images with a wavelength-multiplexed metasurface.
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The remarkable capability in regulating light polarization or amplitude at the nanoscale makes metasurface a leading candidate in high-resolution image display and optical encryption. Diverse binary or grayscale meta-images were previously shown concealed in a single metasurface, yet they are mostly stored at same encryption level and share an identical decryption key, running the risk of exposing all images once the key is disclosed. Here, we propose a twofold optical display and encryption scheme demonstrating that binary and grayscale meta-images can be concurrently embedded in a nonspatially multiplexed silicon metasurface, and their decryptions demand for drastically different keys.
View Article and Find Full Text PDFBidirectional nanoprinting, has received significant attention in image display and on-chip integration, due to its superior advantages. By manipulating the amplitude in a narrow- or broad-band wavelength range of forward and backward incident light, different spatially varied intensities or color distributions can be generated on the structure plane. However, the current scheme cannot fully decouple the bidirectional light intensity due to the limitation of design degree of freedom, and it would hinder the development of asymmetric photonic devices.
View Article and Find Full Text PDFMultifold Integration of Printed and Holographic Meta-Image Displays Enabled by Dual-Degeneracy.
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April 2022
Peng Cheng Laboratory, Shenzhen, 518055, China.
By virtue of the unprecedented ability of manipulating the optical parameters, metasurfaces open up a new avenue for realizing ultra-compact image displays, e.g., nanoprinting on the surface and holographic displaying in the far-field.
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