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Metasurface Lambertian devices based on metasurface materials

A metasurface and Lambertian technology, applied in the field of micro-nano optics, can solve the problems of not being able to obtain optical components at the same time, and achieve the effects of simple and feasible mass production, light weight, and simple and feasible processing

Inactive Publication Date: 2020-11-03
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limited by the existing technology, it is impossible to obtain optical components with these characteristics at the same time

Method used

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  • Metasurface Lambertian devices based on metasurface materials
  • Metasurface Lambertian devices based on metasurface materials
  • Metasurface Lambertian devices based on metasurface materials

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Experimental program
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Embodiment Construction

[0019] The specific implementation of the metasurface Lambertian device based on the metasurface material involved in the present invention will be described in detail below with reference to the accompanying drawings.

[0020]

[0021] Such as figure 1 As shown, in the metasurface Lambertian device, the metasurface array structure is composed of 10 nano-brick units 11, and each nano-brick unit 11 includes: a transparent substrate 11a and a nano-brick 11b. Establish the working surface coordinate system xoy of the nano-brick unit 11, the x-axis direction and the y-axis direction are respectively equal to the long axis and the short axis of the nano-brick unit 11, and the included angle between the long axis and the x-axis is the steering angle of the nano-brick 11b φ. The function of the nano brick 11b can be equivalent to a half-wave plate, then its Jones matrix can be expressed as: When circularly polarized light is incident (the Jones vector of left-handed circularly p...

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Abstract

The invention provides a metasurface lambertian device based on metasurface materials. Incident laser light can be projected into lambertian light intensity distribution covering the whole space of 360 degrees. The metasurface lambertian device based on the metasurface materials is characterized in that a metasurface array structure which is formed by arranging nano brick units, shapes verticallyincident laser light with arbitrary polarization into light intensity to satisfy cosine distribution, satisfies a Mie resonance principle, and appropriately deviates resonance wavelength from design wavelength to enable the energy ratio of transmitted light and the energy ratio of reflected light to be the same is included, wherein the metasurface array structure is used as a phase plate of the metasurface lambertian device, and the nano brick units are composed of transparent medium substrates and nano-bricks formed on the medium substrates, and the medium substrates and the nano-bricks are sub-wavelength sizes.

Description

technical field [0001] The invention belongs to the field of micro-nano optics, in particular to a metasurface Lambertian device based on metasurface materials. [0002] technical background [0003] A Lambertian illuminant means that the intensity of light emitted by a light source or scattered by a scatterer satisfies a cosine distribution, and its characteristic is that no matter from which angle the light source is observed, the brightness seen is the same. Common Lambertian illuminants include filament luminescence and scattering from ground glass surfaces. Among them, filament light-emitting devices are rarely used due to problems such as low efficiency and short life. Although frosted glass can obtain Lambertian light intensity distribution and is cheap, it has a large loss of incident light and can only work in the transmission space. , cannot cover the full 360° space. However, the 360° full-space Lambertian light source is very useful in many fields, such as indoo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/00G02B27/09
CPCG02B5/00G02B27/0927G02B27/0938
Inventor 李子乐戴琦邓联贵付娆崔圆陈奎先何桃桃周楠李嘉鑫邓娟郑国兴
Owner WUHAN UNIV