Metamaterial structure for modulating terahertz wave
A terahertz and metamaterial technology, which is applied in the field of metamaterial structures modulated by terahertz waves, can solve the problems that are not conducive to the popularization and application of terahertz wave technology, cannot meet the requirements of terahertz broadband modulation, and use high environmental requirements, and is conducive to popularization Application, simple structure, and low environmental requirements
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[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] Such as figure 1 and figure 2 As shown, a metamaterial structure for terahertz wave modulation includes: a central dielectric layer 1 made of polyethylene material transparent to terahertz waves, and its thickness 2t is less than one-tenth of the wavelength of the incident terahertz wave , since the polyethylene material is an insulator, its dielectric constant is positive in the terahertz band. The grating layer 2 on the upper surface is made of metal material and is composed of a series of periodically distributed parallel grids located on the upper surface of the central dielectric layer 1. Each grid forms a cycle with the grid gaps on both sides, and the length of the cycle is d. The thickness h of each grid is smaller than the width a. The grating layer 3 on the lower surface is made of metal material, and is composed ...
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