An Optically Controlled Terahertz Spatial External Phase Modulator

A phase modulator, a space-external technology, applied in the direction of instruments, optics, nonlinear optics, etc., to achieve the effect of easy production, improved control ability, and avoid difficult processing
CN107340612BActive Publication Date: 2019-10-01UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2019-10-01

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Abstract

The invention provides an optically controlled terahertz space external phase modulator, which belongs to the technical field of electromagnetic functional devices. The invention is composed of a semiconductor substrate, an artificial microstructure and a controllable dynamic switch. By applying external light induction, the electrical conductivity and dielectric constant of the switch material are changed, thereby changing the electromagnetic resonance mode of the artificial microstructure, thereby controlling the terahertz waves to achieve phase modulation. The phase modulator provided by the present invention can realize a phase modulation depth of more than 100 degrees and a maximum phase modulation capability of more than 150 degrees in a large bandwidth; it can be realized by microfabrication technology, and the preparation process is mature and reliable; it realizes semiconductor materials and artificial microstructures The dynamic phase control device combined with the array, the switch material can choose a variety of high-performance semiconductor materials, and there are a variety of control methods to choose from. practical application value.
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Description

technical field

[0001] The invention belongs to the technical field of electromagnetic functional devices, and also belongs to the field of communication devices including modulators, filters, photoconductive switches and the like. Background technique

[0002] Terahertz wave is a new type of electromagnetic spectrum between photonics and electronics, usually referring to electromagnetic radiation with a frequency within 0.1THz to 10THz. In recent years, thanks to the rapid development of terahertz source and detection technology, terahertz wave-based imaging, spectrum analysis, electronic information, radar positioning and other technical fields have shown great application prospects. At the same time, terahertz wireless communication technology, as one of the important directions in the terahertz field, is currently receiving attention from all over the world. As a wireless communication carrier, terahertz wave has ultra-high bandwidth, good penetration ability (compared ...

Claims

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