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Topological photonic crystal composite structure for realizing one-way transmission of light waves based on energy band inversion

A unidirectional transmission, photonic crystal technology, applied in the field of quantum optics and optical communication systems

Active Publication Date: 2020-11-20
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although these designs can realize the one-way conduction function of photons at the micro-nano scale, they require higher energy to reflect the nonlinear characteristics, which puts forward higher requirements for the design and application of devices.

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  • Topological photonic crystal composite structure for realizing one-way transmission of light waves based on energy band inversion
  • Topological photonic crystal composite structure for realizing one-way transmission of light waves based on energy band inversion
  • Topological photonic crystal composite structure for realizing one-way transmission of light waves based on energy band inversion

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Embodiment Construction

[0016] In order to make the advantages, technical solutions and objectives of this embodiment clearer, the technical solution of the present invention will be described in detail below.

[0017] Such as figure 1 As shown, the present invention provides a topological photonic crystal composite structure based on energy band inversion to realize unidirectional transmission of light waves, including photonic crystal PhC1 and photonic crystal PhC2 with interface 1 as the boundary. Both the photonic crystal PhC1 and the photonic crystal PhC2 are dielectric tubes with air as the background and the same inner diameter and outer diameter. The difference is that the dielectric tubes at the same position in the two recovery cells have different dielectric constants. The entire photonic crystal The structure is arranged according to the structure of graphene.

[0018] Specifically, in this embodiment, the lattice constant of the photonic crystal PhC1 and the photonic crystal PhC2 is a=2...

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Abstract

The invention belongs to quantum optics and optical communication systems, and particularly relates to a topological photonic crystal composite structure for realizing one-way transmission of light waves based on energy band inversion. A topological photonic crystal composite structure for realizing unidirectional transmission of light waves based on energy band inversion comprises two kinds of two-dimensional photonic crystals PhC1 and PhC2 with the same crystal lattice and the same type, and unidirectional transmission of light is realized on an interface of the two kinds of two-dimensionalphotonic crystals. According to the invention, the structure can realize unidirectional transmission of TM mode light, is immune to defects and impurities, and can provide a new thought for designinga novel optical waveguide for an efficient optical transmission problem.

Description

technical field [0001] The invention belongs to quantum optics and optical communication systems, and in particular relates to a topological photonic crystal composite structure that realizes unidirectional transmission of light waves based on energy band inversion. Background technique [0002] Photonic crystal is a new artificial structure material proposed by people in the past two decades. It has the characteristics of small size and low optical loss. It is suitable for making micro-integrated optical devices and has extremely high application value in many fields, such as photonic crystal filter devices, photonic Crystal fiber and other new optical devices. At present, the widely used method to realize the one-way transmission of photons is to add nonlinear materials into photonic crystals, and realize the one-way transmission of light waves through nonlinear characteristics. However, although these designs can realize the one-way conduction function of photons at the ...

Claims

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Application Information

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IPC IPC(8): G02B1/00G02B6/122
CPCG02B1/005G02B6/1225
Inventor 张明达李雪梅朱小冬杨毅彪费宏明刘欣曹斌照
Owner TAIYUAN UNIV OF TECH
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