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One-way slow optical defect waveguide structure and nonreciprocal device based on magnetic photonic crystal

A magnetic photonic crystal, defect waveguide technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of signal distortion, bandwidth group velocity dispersion increase, optical pulse deformation, etc., to overcome the large size and broad market application value Effect

Active Publication Date: 2020-03-31
GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Reduced bandwidth or increased group velocity dispersion can cause the optical pulse to deform after it travels in the waveguide, leading to signal distortion

Method used

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  • One-way slow optical defect waveguide structure and nonreciprocal device based on magnetic photonic crystal
  • One-way slow optical defect waveguide structure and nonreciprocal device based on magnetic photonic crystal
  • One-way slow optical defect waveguide structure and nonreciprocal device based on magnetic photonic crystal

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Embodiment Construction

[0022] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the associated drawings. Preferred embodiments of the invention are shown in the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that a thorough and complete understanding of the present disclosure is provided.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed item...

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Abstract

The invention relates to a one-way slow light defect waveguiding structure based on magnetic photonic crystals and a non-reciprocal device. In the one-way slow light defect waveguiding structure, multiple second dielectric cylinders are distributed at the two sides of first dielectric cylinders which are arranged in lines and periodically arranged into the tone-way slow light defect waveguiding structure and the non-reciprocal device, by inserting the first dielectric cylinders which are arranged in lines into the magnetic photonic crystals to form a defect structure, when a magnetic field is applied to the two-dimensional magnetic photonic crystal areas formed by the second dielectric cylinders which are distributed at the two sides of the first dielectric cylinders, if an opposite external bias magnetic field is applied in the +Z direction, two one-way boundary modes in the same direction can be formed to form positive coupling, and one-way transmission and slow light characteristics of electromagnetic waves can be achieved. In addition, the one-way slow light defect waveguiding structure solves the problems that traditional non-reciprocal devices such as an optical isolator are large is size, huge in damage and difficult to integrate and has the wide market application value in the non-reciprocal devices such as an optical communication device.

Description

technical field [0001] The invention relates to the technical field of electromagnetic applications, in particular to a magnetic photonic crystal-based unidirectional slow light defect waveguide structure and a non-reciprocal device. Background technique [0002] The action of the external magnetic field can destroy the time-reversal symmetry of the electromagnetic wave in the magnetic photonic crystal, forming a unidirectional boundary mode, resulting in the unidirectional propagation of the electromagnetic wave. At present, using two-dimensional photonic crystals composed of magneto-optic materials, the unidirectional boundary mode of electromagnetic waves has been experimentally confirmed in the microwave range. The emergence of electromagnetic wave unidirectional boundary modes provides a new physical mechanism for the realization of new non-reciprocal photonic devices, which may not be realized with traditional reciprocal electromagnetic modes. In addition, with the de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/09
CPCG02F1/093
Inventor 简碧园罗国强王宏
Owner GUANGZHOU VOCATIONAL COLLEGE OF SCI & TECH
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