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Metasurface lens

A metasurface and lens technology, applied in the field of optics, can solve the problem of low focusing efficiency of visible light and achieve the effect of phase modulation

Pending Publication Date: 2018-08-24
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention provides a metasurface lens to solve the problem that the existing metasurface lens has low focusing efficiency for visible light

Method used

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Embodiment Construction

[0025] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims. The terminology used in this application is for the purpose of describing particular embodiments only, and is not intended to limit the application.

[0026] see Figure 1A , the metasurface lens includes a substrate 110 and a microstructure array on the substrate 110 , the microstructure array includes a plurality of microstructures 120 .

[0027] like Figure 1B As shown, any microstru...

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Abstract

The invention provides a metasurface lens, including a plurality of sub-structures. Each sub-structure comprises a microstructure and a partial substrate supporting the microstructure. Sizes of each sub-structure on any direction are the same. The partial substrates of all sub-structures form a substrate of the metasurface lens. The microstructures of all sub-structures form a microstructure arrayof the metasurface lens. Phase corresponding to the central position of each microstructure included in the microstructure array can be determined by incident light wavelength, metasurface lens focallength, and projection distances of the center of the microstructure and the center of the metasurface lens on a phase modulation direction. The lens can effectively improve focusing efficiency of incident light in visible bands.

Description

technical field [0001] The present application relates to the field of optical technology, in particular to a metasurface lens. Background technique [0002] Metasurface is an ultra-thin two-dimensional array plane composed of a series of sub-wavelength artificial microstructures. It has the characteristics of relatively simple fabrication, relatively low loss, small volume, and ultra-thin thickness. It can realize the amplitude and phase of electromagnetic waves. , propagation mode, polarization state and other aspects of the effective control. [0003] In recent years, a variety of hyperplanes have been proposed, such as V-type, U-type, cross-type, L-type, and rotation based on the P-B phase principle, etc. However, the metalens made based on these hyperplanes The focusing efficiency of incident light in the visible light band is very low. Contents of the invention [0004] In view of this, the present invention provides a metasurface lens to solve the problem of low f...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B3/00
CPCG02B1/002G02B3/0006G02B3/005
Inventor 韦中超梁瑶瑶汪伟劳朝德毛敏
Owner SOUTH CHINA NORMAL UNIVERSITY
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