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Terahertz reflector based on silicon meta-surface

A metasurface and terahertz technology, applied in mirrors, optics, instruments, etc., can solve the problems of difficult fabrication of mirrors, low reflection efficiency, and high cost, and achieve the effects of simple structure, wide application value, and wide application range

Inactive Publication Date: 2018-09-18
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, these mirrors have problems such as difficulty in fabrication, high cost, narrow bandwidth, and low reflection efficiency

Method used

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  • Terahertz reflector based on silicon meta-surface
  • Terahertz reflector based on silicon meta-surface

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Embodiment Construction

[0018] Specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the embodiment of the present invention is composed of a dielectric block 1 and a silicon dioxide substrate 2. The dielectric block 1 is a cubic dielectric block, and the cubic dielectric blocks are arranged periodically. The size of each cubic dielectric block is the same. Incident from the air layer to the surface of the cube dielectric block, total reflection occurs.

[0020] The cubic dielectric block is a silicon cubic dielectric block, the width of the cubic dielectric block is 170 μm, and the period is 240 μm.

[0021] figure 2 The working frequency of the mirror shown is 0.5~0.585THz, in figure 1 In the implementation manner, the linearly polarized wave is vertically incident on the surface of the single-layer medium to achieve total reflection. The broadband reflector based on the isotropic electromagnetic...

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Abstract

The invention discloses a terahertz reflector based on a silicon meta-surface, and relates to an optical element. The reflector consists of medium blocks and a silicon dioxide substrate, and the medium blocks are cubic medium blocks and are arranged periodically, wherein the sizes of all medium blocks are the same. The width of each medium block is 170 microns, and the period is 240 microns. The working principle is that an incident wave excites a dielectric medium to perform Mie resonance to arouse the strong coupling effect of an electric field, thereby achieving the broadband total reflection. The reflector is not sensitive to polarization, and the incidence of TE and TM waves can achieve the same total reflection effect. Moreover, the reflector can be adjusted through the changing of the geometric size, and achieves the total reflection of incident waves through the control of the propagation of electromagnetic waves. The reflector is simple in structure, is wide in application range, is not sensitive to the polarization mode of incident waves, and is high in application value for the design of a photoelectric device.

Description

technical field [0001] The invention relates to a broadband reflector, in particular to a terahertz reflector based on a silicon metasurface. Background technique [0002] Traditional metal mirrors have disadvantages such as high loss, difficulty in processing, and high price. Artificial metamaterials can achieve physical properties that natural materials do not have by adjusting structural geometric parameters, and solve the above problems of traditional materials. It provides a new direction for the design of broadband mirrors. [0003] At present, the high-efficiency mirrors of electromagnetic metamaterials mainly include: [0004] 1. A one-dimensional photonic crystal reflector with a photonic bandgap structure, which realizes total reflection in this frequency band by suppressing the propagation of electromagnetic waves of certain frequencies. [0005] 2. A Bragg reflector based on plasmons, with a sub-wavelength structure arranged in the order of semiconductor-dielec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/08G02B1/10H01Q15/00H01Q15/14
CPCG02B5/08G02B1/10H01Q15/0086H01Q15/145
Inventor 宋争勇
Owner XIAMEN UNIV
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