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Optical waveguide structure capable of regulating and controlling boundary state of topological photonic crystal

A photonic crystal and optical waveguide technology, applied in optics, static indicators, nonlinear optics, etc., can solve the problems of uncontrollable frequency, low transmission efficiency, weak locality, etc., and achieve improved transmission efficiency and good robustness , the effect of low price

Active Publication Date: 2020-12-29
JIANGSU UNIV
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  • Abstract
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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides an optical waveguide structure that can control the boundary state of topological photonic crystals to overcome the problems of weak photon localization, low transmission efficiency and inability to control the frequency of traditional waveguides

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  • Optical waveguide structure capable of regulating and controlling boundary state of topological photonic crystal
  • Optical waveguide structure capable of regulating and controlling boundary state of topological photonic crystal
  • Optical waveguide structure capable of regulating and controlling boundary state of topological photonic crystal

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Embodiment Construction

[0024]The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0025]In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "axial", The orientation or positional relationship indicated by "radial", "vertical", "horizontal", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description , Rather than indicating or implying th...

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Abstract

The invention provides an optical waveguide structure capable of regulating and controlling the boundary state of a topological photonic crystal. The optical waveguide structure comprises an upper metal plate, a lower metal plate, a waveguide, a background material and a shell, wherein the upper metal plate and the lower metal plate are arranged in the shell, the waveguide is arranged between theupper metal plate and the lower metal plate, the waveguide is composed of a part A and a part B, the part A is formed by arranging unit cells with moderate topological properties, the part B is formedby arranging unit cells with non-moderate topological properties, each unit cell is formed by arranging six cylindrical dielectric cylinders with the radius of 0.12a, the cross section of each unit cell is in a regular hexagon shape, the distance radius from the center of each unit cell to the corresponding cylindrical dielectric cylinder in the unit cell is R, the distance between the centers ofevery two adjacent unit cells is a lattice constant a, the unit cells with the moderate topological property meet a / R=3.36, and the unit cells with the non-moderate topological property meet a / R=2.8.The problems that a traditional waveguide photon is weak in locality and low in transmission efficiency, and the frequency cannot be regulated and controlled are solved.

Description

Technical field[0001]The invention relates to a photonic crystal optical waveguide structure, in particular to an optical waveguide structure capable of regulating the boundary state of a topological photonic crystal.Background technique[0002]Realizing the quantum spin Hall effect, obtaining stable boundary modes and photonic pseudo-spin mechanism, topological photonic crystals have become a hot research topic. Based on C6The symmetrical honeycomb photonic crystal structure can realize the energy band reversal of the photonic band gap from closed to open without external magnetic field or low temperature, and the edge state protected by the topology appears. The interaction between light and matter in the photonic crystal structure is used to design optical waveguide devices with superior performance, which provides a new direction for applications such as non-reciprocal filters and tunable spin switches.[0003]At present, the topological boundary state of unidirectional transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1333G02F1/133
CPCG02F1/1333G02F1/13306
Inventor 许孝芳郭幸运牟双双张浩黄靖宇
Owner JIANGSU UNIV
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