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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

Active Publication Date: 2019-10-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in addition to amplitude modulation, terahertz wave modulation also needs to achieve phase modulation. However, there are few reports on related high-performance devices. How to realize large-scale and high-speed modulation of phase has become a bottleneck technology in this research field.

Method used

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  • An Optically Controlled Terahertz Spatial External Phase Modulator
  • An Optically Controlled Terahertz Spatial External Phase Modulator
  • An Optically Controlled Terahertz Spatial External Phase Modulator

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Embodiment Construction

[0027] The present invention will be described in more detail below in conjunction with the accompanying drawings and examples.

[0028] This specific embodiment provides an optically controlled terahertz space external phase modulator, the structural diagram of which is shown in figure 1 As shown, it includes a semiconductor substrate 1 and an artificial microstructure resonant array 2; the artificial microstructure resonant array 2 is composed of periodically distributed dynamic electromagnetic resonant units, and the unit structure schematic diagram is as follows figure 2 As shown, each resonant unit includes an artificial microstructure 3 and a controllable dynamic switch 4; the artificial microstructure resonant array 2 is an M×N array composed of a plurality of resonant units, wherein M≥4, N≥4; Each row of adjacent artificial microstructures 3 in the artificial microstructure resonant array 2 is connected to each other through two upper and lower transverse branches.

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/015
Inventor 张雅鑫赵运成梁士雄杨梓强
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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