Unlock instant, AI-driven research and patent intelligence for your innovation.

A subwavelength metal microstructure array capable of realizing unidirectional circular polarizers operating in two frequency bands

A technology of metal microstructure and circular polarizer, which is applied in the direction of polarizing elements, can solve the problems of difficult processing of structures

Inactive Publication Date: 2017-10-20
TIANJIN NORMAL UNIVERSITY
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing design and technology of using sub-wavelength metal microstructure materials to realize circular polarizers, there are still many technical difficulties in realizing circular polarizers with multiple working frequency bands, and it is necessary to integrate multiple resonant structures to realize the complex structure. It is difficult to process, so it is of great significance to seek a circular polarizer with a simple and easy-to-process metal microstructure material unit structure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A subwavelength metal microstructure array capable of realizing unidirectional circular polarizers operating in two frequency bands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Design of dual-band unidirectional circular polarizer in the infrared range (1)

[0031] A sub-wavelength metal microstructure array capable of realizing a dual-band unidirectional circular polarizer in the infrared range. In this embodiment, the unit of the structural array is a square unit with a size of 250 nm×250 nm; the effective structure contains three layers of materials, which are Metal-glass-metal configuration; the upper unit structure is a zigzag metal structure, using gold, the length is 180 nm, the zigzag arm length is 150 nm, the width is 50 nm, and the thickness is 30 nm; the middle substrate layer is glass , the refractive index is 1.47, and the thickness is 30nm; the lower metal unit structure is a continuous metal wire, the material is gold, the length is 250 nm, the width is 120 nm, and the thickness is 100 nm. Therefore, the total thickness of the structured material in the direction of light propagation is 160 nm. The center frequency of the first...

Embodiment 2

[0034] Design of dual-band unidirectional circular polarizer in the infrared region (2)

[0035] A sub-wavelength metal microstructure array capable of realizing a dual-band unidirectional circular polarizer in the infrared region. The working frequency band of this embodiment has a certain shift compared with the first embodiment. In this embodiment, the unit of the structural array is a square unit with a size of 200 nm×200 nm; the effective structure contains three layers of materials in a metal-glass-metal configuration; the upper unit structure is a zigzag metal structure, using gold, Its length is 180 nm, the zigzag arm length is 125 nm, the width is 50 nm, and the thickness is 30 nm; the intermediate substrate layer is glass with a refractive index of 1.47 and a thickness of 30 nm; the lower metal unit structure is a continuous metal wire, The material is gold, the length is 200 nm, the width is 120 nm, and the thickness is 100 nm. Therefore, the total thickness of th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a sub wavelength metal micro structure array realizing a unidirectional circular polarizing film working under two frequency bands. The sub wavelength metal micro structure array is characterized in that the sub wavelength metal micro structure array includes two layers of sub wavelength metal micro structure arrays and an intermediate substrate layer; the sub wavelength metal micro structure arrays are located at two surfaces of the substrate layer; the units of the upper sub wavelength metal micro structure array layer are composed of Z-shaped metal lines; the units of the lower upper sub wavelength metal micro structure array layer are composed of continuous metal lines; the intermediate substrate layer is made of glass; and the metal layers are made of gold. The sub wavelength metal micro structure array can be adopted as the unidirectional circular polarizing film working under two frequency bands. The sub wavelength metal micro structure array has the advantages of structural simplicity, easiness in preparation, convenience in material acquisition and wide application range. With the device of the invention adopted, different electromagnetic application requirements can be satisfied in a certain wavelength range, for example, display and imaging, optical communication, optical calculation and the like.

Description

[0001] This invention was funded by National Natural Science Foundation of China 11304226. technical field [0002] The invention relates to the design of a sub-wavelength metal microstructure array realizing the function of a dual-band unidirectional circular polarizer, in particular to a subwavelength metal microstructure array capable of realizing a unidirectional circular polarizer working in two frequency bands. Background technique [0003] Realizing the effective control of light polarization is of great significance, not only can deepen the understanding of the interaction mechanism between light and matter, but also has important application prospects in many other aspects. For example, the simplest light polarization manipulation device is a polarizer. A polarizer can be defined as a polarizing filter that allows light of a specific polarization to pass through while preventing light of an unwanted polarization from passing through. Commonly used polarizers are li...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30
CPCG02B5/30
Inventor 康明
Owner TIANJIN NORMAL UNIVERSITY