Terahertz wave modulator based on atomic vacancy-like defect

Abstract

The invention discloses a terahertz wave modulator based on an atomic vacancy-like defect, and belongs to the technical field of terahertz wave modulators. The modulator comprises a substrate and a metamaterial structure layer formed on the substrate, the metamaterial structure layer comprises a plurality of metamaterial units arranged in an array mode, each metamaterial unit is composed of four C-type resonance rings arranged in a 2 * 2 mode, any C-type resonance ring is made of semiconductor materials or vanadium dioxide, and the other three C-type resonance rings are made of metal materials. One C-type resonance ring in the unit structure is made of the semiconductor material or vanadium dioxide, the other three C-type resonance rings are made of the metal materials, the semiconductor material or vanadium dioxide is introduced to serve as a vacancy defect in the structural unit, and the double-resonance effect can be achieved; meanwhile, further, the active regulation and control of terahertz waves can be realized through an external excitation mode of heating or optical pumping, the structure is simple, and the stability is good.

Description

technical field [0001] The invention belongs to the technical field of terahertz wave modulators, in particular to a terahertz wave modulator based on atomic vacancy defects. Background technique [0002] Terahertz wave is an electromagnetic wave between photonics and electronics. It usually refers to electromagnetic waves in the range of 0.1THz to 10THz. It is widely used in communication, imaging, radar and other fields. At the same time, terahertz wave technology was rated as one of the "Ten Technologies that Will Change the Future World" by the United States, and was listed as the first among the "Ten Key Strategic Objectives of the National Pillar" by Japan. There is no doubt that terahertz control devices have become one of the key core devices. [0003] Metamaterials refer to artificial composite microstructure materials with electromagnetic properties that natural materials do not have. At present, there have been many studies on the use of metamaterials to regulat...

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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