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Crescent windmill superstructure surface

A superstructure, windmill technology, applied in the field of optics and optoelectronics, to achieve the effect of simple manufacturing

Inactive Publication Date: 2017-04-26
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of simultaneously realizing local vector light field intensity and polarization regulation, and to provide a new type of crescent-shaped superstructure surface for generating local compound polarized light field

Method used

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  • Crescent windmill superstructure surface
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  • Crescent windmill superstructure surface

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Embodiment 1

[0017] like figure 1 As shown, the superstructure surface of the crescent wind model provided by the present invention is composed of a dielectric substrate and a windmill-shaped metal structure. The structure is composed of crescent-shaped structures arranged at equal angles and in the same direction of rotation, and divides the angle of the plane circumference into N equal parts. The dielectric substrate is a cubic structure, and the substrate size is S×S×H, where S is the length and width of the substrate, and H is the thickness of the substrate. The geometric shape of the crescent-shaped fan blade can be obtained by intercepting two cylinders equivalently, and the section radii of cylinder 1 and cylinder 2 that intercept the crescent-shaped shape satisfy the relation

[0018]

[0019] where m is defined as the crescent factor, m≥2 and m is a positive integer, R 1 is the section radius of cylinder 1, R 2 is the section radius of the cylinder 2, and the section center ...

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Abstract

Disclosed is a crescent windmill superstructure surface producing a local complex polarized light field. The substrate of the superstructure is an optical dielectric material. The superstructure surface is of a windmill nano metal structure, and is composed of multiple blades arranged at equal angles, wherein each blade is crescent. The windmill structure binds incident light energy to the superstructure surface, and produces a local strong field at the tip of each crescent blade finally. As the blades of the windmill are arranged at equal angles, incident linearly-polarized light can be converted into local complex polarization. The number of focus points, enhancement factor and local polarization state of a focus field can be regulated by changing the number of blades N and a crescent factor m. The crescent windmill superstructure surface can be used as a polarization converter or a particle manipulation waveguide, and has important application value in fields like light field polarization modulation and nano manipulation.

Description

technical field [0001] The invention belongs to the field of optics and photoelectric technology, and relates to light field polarization modulation, nanometer manipulation and surface plasmon excitation, in particular to a novel wind-shaped superstructure surface for generating local compound polarized light fields. Background technique [0002] Metasurfaces are one-dimensional or two-dimensional subwavelength periodic artificial plasmonic arrays. Because the thickness of the metasurface is extremely small compared with the operating wavelength, the metasurface can be regarded as a discontinuous interface that changes the amplitude and phase of the incident light, so the metasurface is usually used for light field regulation, such as: phase regulation, polarization regulation, etc. . In the existing research on metasurfaces in the world, it is seldom considered to simultaneously realize the local polarization control of the vector light field and the control of the strong ...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B27/28
CPCG02B1/002G02B27/286
Inventor 匡登峰杨卓
Owner NANKAI UNIV
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