A non-reciprocal magneto-optical terahertz beam scanner

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 ...

AI Technical Summary

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

Images