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Optical element having heterogeneous polarization selectivity

An optical element, selective technology, applied in the direction of polarizing elements, etc., can solve the problem that it is difficult to obtain axially symmetric polarization simply

Inactive Publication Date: 2016-05-11
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the prior art is difficult to simply obtain axisymmetric polarization

Method used

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  • Optical element having heterogeneous polarization selectivity
  • Optical element having heterogeneous polarization selectivity
  • Optical element having heterogeneous polarization selectivity

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Embodiment 1

[0042] This embodiment discloses an optical element with non-uniform polarization selectivity, see figure 1 , including a transparent substrate, and a sub-wavelength grating formed on the transparent substrate;

[0043] see image 3 , the subwavelength grating has three layers, the upper and lower layers are gold layers with a thickness of 0.1um; the middle is a silicon layer with a thickness of 6.9um; that is, the groove depth of the subwavelength grating is 7um.

[0044] see figure 1 , the transparent substrate is a square plate. Its center radiates eight boundary lines; these eight boundary lines divide a surface of the transparent substrate into eight sectors, which are respectively recorded as the first sector, the second sector ... the eighth sector (with Arabic Numbers 1 to 8 mark each area); in the embodiment, the eight dividing lines are evenly distributed, that is, the angle between two adjacent dividing lines is 45°, that is, the angle of each sector is also 45...

Embodiment 2

[0055] This embodiment discloses an optical element with non-uniform polarization selectivity, see figure 2 , including a transparent substrate, and a sub-wavelength grating formed on the transparent substrate;

[0056] see image 3 , the subwavelength grating has three layers, the upper and lower layers are gold layers with a thickness of 0.1um; the middle layer is a silicon layer with a thickness of 6.9um; that is, the groove depth of the subwavelength grating is 7.1um.

[0057] see figure 2 , the transparent substrate is a square plate. Its center radiates eight boundary lines; these eight boundary lines divide a surface of the transparent substrate into eight sectors, which are respectively recorded as the first sector, the second sector ... the eighth sector (with Arabic Numbers 1 to 8 mark each area); in the embodiment, the eight dividing lines are evenly distributed, that is, the angle between two adjacent dividing lines is 45°, that is, the angle of each sector is...

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Abstract

The invention discloses an optical element having heterogeneous polarization selectivity. The optical element comprises a transparent substrate, and a sub-wavelength raster formed on the transparent substrate, wherein the sub-wavelength raster has three layers, the upper and the lower layers are metal layers with thickness in a range of 0.1-0.3um, the middle layer is a silicon layer with thickness of 6-8um, any point of a board surface of the transparent substrate is selected as a center, eight boundary lines radiate from the center, the surface of the transparent substrate is divided by the eight boundary lines into eight sections, namely a first section, a second section, a third section, a fourth section, a fifth section, a sixth section, a seventh section and an eighth section, each area is a three-layer sub-wavelength raster, and periods and duty ratios of various areas are different respectively. Through the optical element, polarized light filtering is realized, and satisfactory radial polarized light beams or angle polarized light beams can be acquired.

Description

technical field [0001] The invention relates to a polarization optical element, in particular to an optical element with a polarization conversion function. Background technique [0002] The vector characteristics and polarization characteristics are the basic properties of optical frequency electromagnetic fields. The vector characteristics, polarization characteristics of light beams and their applications in the fields of optical measurement, microscopy, optical storage, optical communication and laser processing have been extensively and deeply studied. Research. However, most of these works are limited to spatially uniform polarized beams, such as linear, circular, and elliptical polarizations. With the continuous development of laser technology, the existence of a beam with a spatially non-uniform polarization distribution has been confirmed by theoretical models and experimental results. As a special form of non-uniformly polarized beams, axisymmetrically polarized ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/30
CPCG02B5/30
Inventor 喻洪麟张明张作军何安国康治平陈思成陈俊妍
Owner CHONGQING UNIV