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Photonic crystal with humidity control band gap

A phononic crystal and humidity control technology, which is applied in the direction of sound-producing equipment, instruments, chemical process analysis/design, etc., can solve the problem of difficulty in controlling the band gap in the external field, and achieve the effect of controlling the band gap in the external field humidity.

Inactive Publication Date: 2019-09-27
宁海县浙工大科学技术研究院
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing phononic crystals are difficult to control the bandgap by an external field, the present invention provides a phononic crystal with a humidity-controlled bandgap that can effectively realize the bandgap controlled by an external field, so as to achieve the purpose of adjusting the bandgap without re-preparation

Method used

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  • Photonic crystal with humidity control band gap
  • Photonic crystal with humidity control band gap
  • Photonic crystal with humidity control band gap

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] refer to figure 1 , a phononic crystal with a humidity-controlled bandgap, including a scatterer material and a matrix water-absorbing material, the matrix water-absorbing material is arranged in a two-dimensional periodic structure, and the wave equation in the XY mode of the phononic crystal is:

[0019]

[0020] Among them, ρ(r) is the density parameter of the material, λ(r), μ(r) are the first Lame parameter and the second Lame parameter respectively, and they are collectively referred to as material parameters; u xy (r, t) represents the displacement function under the position vector r, t represents the time component, and the subscripts x and y represent the displacement, which are only related to the x and y coordinates; is the vector differentiation operator, It is a second-order vector differential operator, also called Laplace operator; through...

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Abstract

The invention discloses a photonic crystal with a humidity control band gap. The photonic crystal comprises a scatterer material and a matrix water-absorbing material, the matrix water-absorbing material is arranged in a two-dimensional periodic structure, and a function relationship between the mass density of the matrix water-absorbing material and a photonic crystal band gap in the two-dimensional periodic structure is derived through a wave equation in an XY mode, so that the purpose of controlling the band gap by using external field humidity is achieved. The invention provides the photonic crystal for effectively realizing the humidity control band gap of the external field control band gap, so that the purpose of adjusting the band gap without repreparation is achieved.

Description

technical field [0001] The invention relates to the field of phononic crystals, in particular to a phononic crystal with a bandgap controlled by humidity. Background technique [0002] Phononic Crystals are materials or structures with elastic constants and periodic density distributions. When the elastic wave propagates in the phononic crystal, affected by its internal structure, it is prevented from propagating in a certain frequency range (band gap), while it can propagate in other frequency ranges (pass band). At present, conventional phononic crystals have the problem of difficulty in controlling the band gap by an external field. Contents of the invention [0003] In order to overcome the disadvantage of the existing phononic crystals that it is difficult to control the bandgap by an external field, the present invention provides a phononic crystal with a humidity-controlled bandgap that can effectively realize the bandgap controlled by an external field, so as to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C20/10C08L33/02C08K3/36G10K11/162
CPCG16C20/10C08K3/36G10K11/162C08L33/02
Inventor 诸骏吴化平陈宇丹刘振东
Owner 宁海县浙工大科学技术研究院