Method for realizing dynamic adjustable metasurface based on vector holographic technology

Abstract

The invention discloses a method for realizing a dynamic adjustable metasurface based on a vector holographic technology, and belongs to the technical field of application of micro-nano optics, optical metrology, holographic imaging and holographic optical tweezers. The metasurface is composed of the medium nano-column arrays with rectangular cross sections and azimuth angles of different sizes, and the amplitude, phase and polarization of a light field can be flexibly modulated; and according to the vector holographic coding process, reproduction of any and various vector holographic light fields can be realized at the same time, and dynamic wavefront regulation and control can be realized according to selection of incident / emergent polarization states. The number of polarization states generated by the method provided by the invention is not limited, the information capacity of the metasurface is greatly expanded, and the metasurface has the characteristics of accuracy, ultra-thinness, compactness and sub-wavelength pixels, and can be applied to the application fields of dynamic display, optical encryption and counterfeiting prevention, all-solid-state scanning, holographic optical tweezers and the like.

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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