Anti-PT symmetric RS photonic crystal structure capable of realizing directional suppression and enhancement of reflected light

A photonic crystal and reflected light technology, which is applied in the field of all-optical communication and can solve the problems of unfavorable lateral displacement of the detection reflected beam.

Inactive Publication Date: 2022-01-14
HUBEI UNIV OF SCI & TECH
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When studying the lateral displacement of the reflected beam, it is necessary to use partially reflected reflected light, and near the resonance state, the lateral displacement effect of the b...

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
  • Anti-PT symmetric RS photonic crystal structure capable of realizing directional suppression and enhancement of reflected light
  • Anti-PT symmetric RS photonic crystal structure capable of realizing directional suppression and enhancement of reflected light
  • Anti-PT symmetric RS photonic crystal structure capable of realizing directional suppression and enhancement of reflected light

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0018] Mathematically, the iteration rule of the RS (Rudin-Shapiro: Rudin-Shapiro) sequence is: S 0 = H, S 1 =HH,S 2 =HHHL,S 3 =HHHLHHLH,...,S N = S N-1 (HH→HHHL, HL→HHLH, LH→LLHL, LL→LLLH), ..., where N (N=0, 1, 2, 3, ...) represents the serial number of the sequence, S N Represents the Nth item of the sequence, HH→HHHL represents the S N-1 Replace HH in HHHL with HHHL. In the corresponding RS photonic crystal, the letters H and L represent two homogeneous dielectric sheets with high and low refractive indices, respectively.

[0019] figure 1 Shown is a schematic diagram of the structure of Anti-PT symmetrical RS photonic crystal with sequence number N=4. The RS photonic crystal with the serial number N=4 can be ...

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 provides an Anti-PT symmetric RS photonic crystal structure capable of realizing directional suppression and enhancement of reflected light, and belongs to the technical field of all-optical communication. The structure comprises two RS photonic crystals. Two dielectric sheets with high and low refractive indexes are stacked in sequence according to an RS sequence rule, and a symmetrical distribution structure about a central origin is formed; by modulating the refractive index imaginary part of each dielectric sheet, the photonic crystal structure meets Anti-PT symmetric distribution: n(z)=-n*(-z); the entire structure may be represented as HHHLHHLHHHHLLLHLL'H' L'L'L'H'H'H'H'L'H'H'L'H'H'H'; the dielectric sheets H and L' represent first dielectric layers having a high refractive index, and the dielectric sheets H' and L represent second dielectric layers having a low refractive index. The structure has the advantages of being capable of achieving directional suppression or enhancement of the light wave reflectivity and the like.

Description

technical field [0001] The invention belongs to the technical field of all-optical communication, and relates to an Anti-PT symmetrical RS photonic crystal structure capable of realizing directional suppression and enhancement of reflected light. Background technique [0002] When there is an imaginary part of the refractive index of the dielectric, that is, when there is gain or loss in the material, the reflection spectra of left and right incident light do not overlap. In particular, when the refractive index of the system satisfies PT (Parity-time: parity-time) symmetry in space, the positions of the reflectance zero points in the left and right incident reflection spectra are different. In this way, when light waves of the same wavelength are respectively incident from the left and right directions, there will be a situation where the reflectance of one side is zero and the reflectance of the other side is a finite value. This effect can be applied to optical direction...

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
IPC IPC(8): G02F1/35G02F1/355
CPCG02F1/3503G02F1/3523G02F1/353G02F1/3551
Inventor 杨荣
Owner HUBEI UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap