A terahertz wave modulator based on atom-like vacancy defects

Abstract

A terahertz wave modulator based on atom-like vacancy defects belongs to the technical field of terahertz wave modulators. It includes a substrate, and a metamaterial structure layer formed on the substrate; the metamaterial structure layer includes a plurality of metamaterial units arranged in an array, and the metamaterial units are composed of 4 C-shaped resonant rings arranged in a 2×2 arrangement wherein, any one C-type resonant ring is made of semiconductor material or vanadium dioxide, and the other three C-type resonant rings are made of metal material. One C-type resonant ring in the unit structure of the present invention is a semiconductor material or vanadium dioxide, and the other three C-type resonant rings are metal materials, wherein the introduction of the semiconductor material or vanadium dioxide will serve as a "vacancy defect" in the structural unit ”, which can show the effect of double resonance; at the same time, further, through the external excitation method of heating or optical pumping, the active regulation of terahertz waves can be realized, with simple structure and good stability.

Description

technical field [0001] The invention belongs to the technical field of terahertz wave modulators, in particular to a terahertz wave modulator based on atom-like vacancy defects. Background technique [0002] Terahertz waves are electromagnetic waves between photonics and electronics. They usually refer to electromagnetic waves in the range of 0.1THz to 10THz, and are widely used in communications, imaging, radar and other fields. At the same time, terahertz wave technology was rated as one of the "Top Ten Technologies that Change the Future World" by the United States, and was listed as the top of the "Top Ten Key Strategic Objectives of National Pillars" by Japan. There is no doubt that the terahertz control device has become one of the key core devices. [0003] Metamaterials are artificially fabricated composite microstructured materials with electromagnetic properties that are not found in natural materials. At present, many studies have used metamaterials to control t...

AI Technical Summary

Problems solved by technology

At present, there have been many studies on the use of metamaterials to regulate terahertz waves, mainly by dynamically adjusting the size parameters of the artificial microstructure itself, or adjusting the medium environment in which it is located, or by adjusting the relationship between two terahertz resonators. Coupling to achieve active regulation of terahertz waves, most of them have complex structures, complex and difficult manufacturing processes, and most of them are for the regulation of single resonance

However, for terahertz metamaterial arrays with fixed structure and medium environment, there is no report on how to adjust the response of superstructure arrays to terahertz waves by using the defects existing in artificial microstructure arrays, so as to realize the modulation of terahertz

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