Photonic crystal slow light waveguide based on honeycomb structure

A photonic crystal and honeycomb technology, applied in the direction of optical waveguide light guide, light guide, optics, etc., can solve the problem of lack of research on the control of topological boundary state propagating light group velocity, and achieve the effect of low production cost

Active Publication Date: 2019-08-23
南通宁竞信息科技有限公司
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Problems solved by technology

However, the research on the control of the group velocity of topological boundary states propagating in photonic crystals is still relatively scarce.

Method used

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  • Photonic crystal slow light waveguide based on honeycomb structure
  • Photonic crystal slow light waveguide based on honeycomb structure
  • Photonic crystal slow light waveguide based on honeycomb structure

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0030] Such as figure 1 As shown, the photonic crystal slow light waveguide based on the honeycomb structure of the present invention includes a topologically mediocre structure 1 in the upper part, a topological non-trivial structure 2 in the lower part, and the other part consists of a unit cell with topological non-trivial properties 201 permutations constitute.

[0031] The topologically mediocre structure 1 is composed of multiple layers of topologically mediocre unit cells 101 arranged in a C 6 Arranged in a symmetrical manner, the two-dimensional cross-section of the unit cell of topological mediocrity is a regular hexagon, and the long axis of the cross-section of the dielectric column is parallel to the boundary of the unit cell; two adjacent unit cells of topol...

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Abstract

The invention provides a photonic crystal slow light waveguide based on a honeycomb structure. The photonic crystal slow light waveguide based on the honeycomb structure comprises a topology mediocrestructure and a topology non-mediocre structure, and the other part is composed of crystal cells which are arranged and have topology non-mediocre property. A relatively mild energy band appears in afirst Brillouin zone in an energy band structure, and transmission group velocity of light at the frequency is close to 0, so that slow light transmission is realized. An elliptical dielectric cylinder is made from a common dielectric material silicon, and production cost is low.

Description

technical field [0001] The invention relates to the technical field of photonic crystals, in particular to a photonic crystal slow light waveguide based on a honeycomb structure. Background technique [0002] The topological boundary state is one of the research hotspots in recent years. It is a new state of matter and can be regarded as a direct extension of the quantum spin Hall effect. Take advantage of the C 6 The symmetric honeycomb photonic crystal structure can construct a system with pseudotime-reversal symmetry under the condition of zero magnetic field, and realize a quantum-like topological state of light. By changing the duty cycle of the honeycomb photonic crystal, the photonic bandgap can realize energy band inversion in the process of closing to opening, and a topologically protected boundary state appears. [0003] Currently, the topological boundary states of one-way transport have received great attention from researchers. However, the research on the co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
CPCG02B6/02319
Inventor 高永锋姜震周凯何柳孙佳平宋荷王力锐
Owner 南通宁竞信息科技有限公司
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