A Method for Realizing Dynamically Tunable Metasurfaces Based on Vector Holography

Abstract

The method for realizing a dynamically adjustable metasurface based on vector holography technology disclosed by the invention belongs to the technical fields of micro-nano optics, optical metrology, holographic imaging, and holographic optical tweezers application. The metasurface involved in the present invention is composed of dielectric nanocolumn arrays with different sizes of rectangular cross-sections and azimuth angles, which can realize flexible modulation of the amplitude, phase and polarization of the light field; according to the vector holographic encoding process, any and all Various vector holographic light fields can be reproduced, and dynamic wavefront control can be realized according to the selection of incident / exited polarization states. The number of polarization states generated by the method proposed in the present invention is not limited, which greatly expands the information capacity of the metasurface, and has the characteristics of precision, ultra-thin and compact, sub-wavelength pixels, and can be applied to dynamic display, optical encryption and anti-counterfeiting , all solid-state scanning, holographic optical tweezers and other application fields.

Description

technical field [0001] The invention relates to a method for realizing a dynamically adjustable metasurface based on a vector holography technology, in particular to a method for realizing a dynamically adjustable metasurface of a transmissive medium in an optical band based on a vector holography technology, and belongs to the field of micro-nano optics. Background technique [0002] Metasurface is a man-made two-dimensional material composed of subwavelength resonators. By delicately designing the geometric size, material and arrangement of the resonators, we can obtain strange electromagnetic properties that do not exist in nature, so that the amplitude, phase, and Physical quantities such as wavelength and polarization can be flexibly adjusted. Thanks to its ultrathin and compact size, large information capacity, and rich and flexible modulation properties, metasurfaces have attracted extensive attention from researchers at home and abroad. At present, a large number of...

AI Technical Summary

Problems solved by technology

The grayscale image generated by method (1) is not related to the spatial position, which greatly limits the scope of application

Method (2) achieves seven holographic displays through three independent polarization channels and their combinations, but cannot effectively construct multiple independent vector information at the same time

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