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Tunable terahertz magnetic-control photoswitch

An optical switch and terahertz technology, which is applied in the field of terahertz wave controllable functional devices, can solve the problems of high cost and complex manufacturing process of terahertz optical switches, and achieve the effects of low loss, wide operating spectrum range and fast response speed

Active Publication Date: 2016-08-17
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The manufacturing process of the above-mentioned terahertz optical switch is complicated and the cost is relatively high

Method used

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Embodiment approach

[0017] 1. Combine figure 1 , the tunable terahertz magnetically controlled optical switch provided by the present invention is a cylindrical waveguide with a periodic undulating structure. There are three layers from the inside to the outside. The inner layer is filled with nematic liquid crystal E7 1, and the middle layer is high-density Polyvinyl compound layer 2 (to seal the waveguide filled with liquid crystal), the outer layer is a low loss metal layer 3. Through the adjustment of the external magnetic field, the effective refractive index of the filled nematic liquid crystal molecules is changed to adjust the frequency band of the non-Bragg forbidden band, thus realizing the magnetic control switch function. That is to say, the optical switch of the present invention is composed of a metal waveguide with a periodic undulating structure filled with magnetic field-sensitive nematic liquid crystal E7, and both ends of the waveguide are sealed with high-density polyethylene....

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Abstract

The invention provides a tunable terahertz magnetic-control photoswitch which is a cylindrical waveguide of a periodical undulating structure, consisting of totally three layers from inside to outside, wherein the inner layer is filled with a nematic liquid crystal E7, the middle layer is a high density polyethylene compound (for sealing the waveguide filled with the liquid crystal), and the outer layer is a low-loss metal, respectively. The undulated height of periodical waveguide wall of the waveguide is Epsilon=0.1*r0 (r0 is an average radius of the cylindrical waveguide of the periodical undulating structure), and the thickness of both the high density polyethylene layer and the low-loss metal layer is 1 micron. The invention utilizes the change of the refractive index of a magnetic field to the nematic liquid crystal E7 to realize the regulation of frequency band of waveguide-generated non-Bragg effect, thereby serving as a switch. The tunable terahertz magnetic-control photoswitch provided by the invention has the advantages of simple preparation technology, convenient operation, and stable performance, as well as quick switching speed, small size, easy integration, and wide tunable range, hence, the tunable terahertz magnetic-control photoswitch has a higher scientific significance and a higher application value.

Description

technical field [0001] The invention relates to a terahertz wave controllable functional device, in particular to a tunable terahertz magnetic control optical switch, which belongs to the field of terahertz wave science and technology. Background technique [0002] Terahertz waves usually refer to electromagnetic waves with a frequency between 0.1 and 10 THz. They are between microwave and infrared radiation in the electromagnetic spectrum. They have unique characteristics that neither of them have. Compared with microwave communication, terahertz communication has the advantages of wide transmission bandwidth, small antenna size and strong anti-interference ability, and is suitable for short-distance high-speed communication, space communication and military security. Communication and other fields, and terahertz optical switch is one of the key devices of terahertz communication, and its research is of great significance. [0003] In current reports, terahertz optical swi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/09G02F1/29
CPCG02F1/09G02F1/29
Inventor 陶智勇张鹭赵秋玉刘欢徐兰兰徐丹樊亚仙
Owner HARBIN ENG UNIV
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