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One-way optical transmitter based on double Dirac points and design method

A double Dirac point and optical transmission technology, applied in optics, instruments, optical components, etc., can solve inconvenient problems and achieve the effect of easy energy band, compact structure, and high integration

Active Publication Date: 2017-12-01
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

However, the former requires the action of an external magnetic field to achieve optical rotation, and the latter requires high-power incident light to produce nonlinear effects. Both are not very convenient in practical applications.

Method used

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  • One-way optical transmitter based on double Dirac points and design method
  • One-way optical transmitter based on double Dirac points and design method
  • One-way optical transmitter based on double Dirac points and design method

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Embodiment Construction

[0024] Such as image 3 As shown, the present invention relates to a kind of unidirectional optical transmitter based on double Dirac points, which is composed of a plurality of honeycomb photonic crystals, and the honeycomb photonic crystals adopt a more common dielectric material (silicon), and all photonic crystals are composed of A trapezoidal prism, the trapezoidal prism is a right-angled trapezoid, the incident surface and the outgoing surface of the trapezoidal prism are respectively "armchair-shaped" and "beard"-shaped boundaries, and the two sides are "sawtooth"-shaped boundaries. It should be noted that: armchair shape, beard shape and zigzag shape are all commonly used shape description terms in this field.

[0025] The present invention also discloses a method for designing the above-mentioned one-way optical transmitter, comprising the following steps:

[0026] The first step is to calculate the energy band structure of honeycomb photonic crystals (silicon dielec...

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Abstract

The invention discloses a one-way optical transmitter based on double Dirac points and a design method. The one-way optical transmitter is composed of multiple honeycomb photonic crystals, all the photonic crystals form a trapezoid prism, the incident plane and the emergent plane of the trapezoid prism are an armchair-type boundary and a bearded-type boundary, and two edges are zigzag-type boundaries. One-way transmission of light under any frequency can be realized.

Description

technical field [0001] The invention relates to a microstructure photonic crystal element, in particular to a unidirectional optical transmitter based on double Dirac points and a design method thereof. Background technique [0002] One-way transmission devices are basic components in optical communication systems and play an important role in the process of optical computing and information processing. In order to prevent reflected light from affecting the normal operation of active devices such as light sources and optical amplifiers, ensure the stability of the optical system It is essential to set up a light wave one-way transmitter in the optical path. [0003] Photonic crystals are artificially synthesized materials in which different media are periodically distributed in space. Because their lattice constants and operating wavelengths are on the same order of magnitude, photonic crystal-based unidirectional transmission devices are easier to achieve high integration a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/04G02B1/00G02B27/00
CPCG02B27/0012G02B1/005G02B5/04
Inventor 邱平平邱伟彬
Owner HUAQIAO UNIVERSITY
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