Transmissible and reflective dual-function terahertz wave beam splitter and method thereof

Abstract

The invention discloses a transmissible and reflective dual-function terahertz wave beam splitter and a method thereof. The terahertz wave beam splitter comprises a terahertz wave input end and N*N unit structures, wherein N is a natural number; the N*N unit structures are periodically arranged on a plane perpendicular to the input direction of terahertz waves, and each unit structure comprises an all-dielectric cylindrical structure, a polyimide dielectric layer and a substrate vanadium dioxide; the number of the unit structures is two, the all-dielectric cylindrical structure of one unit structure is a first isosceles triangular cylinder, the all-dielectric cylindrical structure of the other unit structure is a large isosceles triangular cylinder, middle dielectric layers of the two unit structures are both polyimide, and bottom layers of the two unit structures are both vanadium dioxide; and the bottom vanadium dioxide realizes an effect of controlling the transmission and reflection of the designed structure after reaching a phase change condition. The transmissible and reflective dual-function terahertz beam splitter is simple in structure, materials are easy to prepare, conversion of transmission and reflection can be achieved through temperature changes under the condition that the structure is not changed, and the application requirement of a terahertz wave system is met.

Description

technical field [0001] The invention relates to the technical field of terahertz wave applications, in particular to a transmissive and reversible dual-function terahertz wave beam splitter of variable materials and a method thereof. Background technique [0002] Terahertz wave refers to electromagnetic waves with a frequency of 0.1-10THz and a wavelength of 3000-30μm. It coincides with millimeter waves in the long-wave band, and coincides with infrared rays in the short-wave band. Terahertz waves occupy a very special place in the electromagnetic spectrum. s position. Therefore, terahertz technology has broad application prospects in the fields of high-speed communication and imaging. As one of the important devices for terahertz wave control, terahertz wave beam splitter has attracted extensive attention of researchers at home and abroad. In recent years, various terahertz filters, terahertz wave switches, and terahertz wave modulators have been reported. In the process...

AI Technical Summary

Problems solved by technology

In the process of designing a terahertz device, once it is processed and manufactured, it cannot be changed, so it often has a single function, does not have multi-functional characteristics, and cannot be adjusted, which limits the application and development of terahertz technology.

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