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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

Inactive Publication Date: 2010-04-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the resonance absorption of the buckle itself is very obvious, which still cannot meet the modulation of THz broadband
Due to the limitation of the material structure characteristics of the metamaterial used in the modulator, the above method results in a small modulation range and high requirements for the use environment, which is not conducive to the popularization and application of terahertz wave technology.

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  • Metamaterial structure for modulating terahertz wave
  • Metamaterial structure for modulating terahertz wave
  • Metamaterial structure for modulating terahertz wave

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Embodiment Construction

[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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Abstract

The invention relates to a metamaterial structure for modulating a terahertz wave, comprising a central medium layer, an upper surface grid layer and a lower surface grid layer. The central medium layer is made of a polyethylene materials transparent to the terahertz wave and has a thickness smaller than the one-tenth wavelength of an incident terahertz wave; the upper surface grid layer adopts metal material and comprises a series of parallel grids periodically distributed on the upper surface of the central medium layer; each grid and gaps at both sides of the grid form a period, and the thickness of each grid is smaller than the width thereof; the lower surface grid layer adopts a metal material and comprises a series of parallel grids periodically distributed on the lower surface of the central medium layer; each grid and gaps at both sides of the grid form a period,, and the thickness of each grid is smaller than the width thereof; and the grids of the upper surface grid layer and the lower surface grid layer are symmetrically distributed in a mirror mode. The invention has the advantage that the modulation range of the terahertz wave is widened by a modulator because the transmission of the terahertz wave is constantly enhanced by a surface plasma wave.

Description

technical field [0001] The invention belongs to the technical field of metamaterials, in particular to a metamaterial structure used for terahertz wave modulation. Background technique [0002] Terahertz waves are usually defined as coherent electromagnetic radiation with frequencies in the range of 0.1 to 10 THz. The English corresponding to terahertz is teraherta, abbreviated as THz, 1THz=1012Hz (hertz), the oscillation period is 1ps (picosecond), the wavelength is 30μm (micron), and the energy of photons is 4.1meV (millielectron volts). The terahertz waves that are currently studied are usually in the range of 0.3~3THz, and their bands are located between microwaves and infrared rays. They belong to the category of far infrared rays and submillimeter waves, and are sometimes called T-rays. Their notable features are: 1. Transient: The typical pulse width of terahertz waves is on the order of picoseconds, which can not only facilitate time-resolved research on various mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/355
Inventor 张怀武田东斌文岐业李胜
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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