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A non-reciprocal magneto-optical terahertz beam scanner

A beam scanning and terahertz technology, which is applied in the field of magneto-optical terahertz beam scanners, can solve the problems of high control efficiency and non-adjustability, and achieve the effects of high diffraction efficiency, large controllable angle, and easy integration

Inactive Publication Date: 2020-09-29
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Purpose of the invention: The purpose of the present invention is to provide an actively adjustable non-reciprocal beam scanning device based on field effects; it not only solves the non-adjustable shortcomings of many existing passive devices, but also compared with other current active control devices, It has fast response speed, easy integration and high control efficiency

Method used

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  • A non-reciprocal magneto-optical terahertz beam scanner
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  • A non-reciprocal magneto-optical terahertz beam scanner

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Embodiment Construction

[0023] specific implementation plan

[0024] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings; it should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0025] The device of the present invention is characterized in that it is composed of a metal-magneto-optical semiconductor supergrating structure, and it is characterized in that it includes a metal / magneto-optic semiconductor / air waveguide (1), and three waveguides with different duty ratios form a periodic unit (2), Multiple periodic units are arranged to form a super grating (3). TM polarized light (4) is incident on the grating plane from one end....

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Abstract

The invention discloses a nonreciprocal magnetic-optical terahertz wave beam scanner and a work method thereof. The device is a metal-magnetic-optical semiconductor super-grating structure and comprises three different indium antimonide / metal / air waveguide units arranged cyclically, and the super-grating structure has space phases arranged in a gradient manner, so that energy distribution of eachdiffraction level is regulated and large-angle deflection of outgoing beams is realized. Due to nonreciprocity of the indium antimonide / metal / air waveguide units, the deflection angles of emergent light can be effectively controlled under the action of external magnetic fields with different directions and different magnitudes. Compared with conventional mechanical wave beam scanning devices, thedesign is based on field effect regulation and the response speed is high; compared with an all-optical modulation device, the device is not constraint by far field beams in size; and besides, the grating type wave beam scanner is high in regulation efficiency and low in insertion loss. Therefore, the device can be used for devices for terahertz directional transmission, wave beam scanning and thelike.

Description

technical field [0001] The invention belongs to the field of novel artificial magnetic materials and terahertz science and technology, and specifically relates to a multi-angle adjustable, non-reciprocal magneto-optic terahertz beam scanner and a design method thereof. Background technique [0002] Terahertz (THz) waves are located in the frequency range of 0.1THz-10THz. Due to their small photon energy, they are almost non-destructive to human biological tissues and have strong penetrating ability to plastics, etc.; in the fields of biological imaging, nondestructive testing and material spectroscopy, etc. It has broad application prospects and high research value; in recent years, with the development of the Internet, people's demand for high-speed, large-capacity wireless communication networks is also increasing, due to the high-frequency characteristics of terahertz and its much higher than The communication capacity of millimeter waves has attracted much attention and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/29G02F1/00G02F1/09
CPCG02F1/0036G02F1/093G02F1/29G02F1/292
Inventor 范飞谭知雨常胜江
Owner NANKAI UNIV
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