Cherenkov radiation device based on artificial surface plasmon

Abstract

The invention discloses a Cherenkov radiation device design based on an artificial surface plasmon. The Cherenkov radiation device comprises a dielectric layer and two layers of metal sheets, wherein the two layers of metal sheets are fixedly connected with two sides of the dielectric layer and are in mirror symmetry along an extension direction of the metal sheets, the radiation device is of a structure based on dual layers of artificial surface plasmon waveguides, a periodic phase reverse structure is introduced into the waveguides, and thus, structural mutation with discontinuous impedance is generated in the structure. On the basis of the artificial surface plasmon waveguides, mode conversion and high-efficiency radiation of artificial surface plasmon are achieved, and moreover, the radiation and the beam direction of the artificial surface plasmon are effectively controlled by changing dispersion characteristics; by the Cherenkov radiation device, high-efficiency conversion between a conduction mode and a space radiation mode can be achieved, the development of a device and a functional device of a novel waveguide structure can be promoted to a great extent, and the Cherenkov radiation device has important application prospect in aspects of circuits, signal transmission, processing and the like in future.

Description

Technical field [0001] The invention relates to a Cherenkov radiation device based on artificial surface plasmons, which belongs to the field of new artificial electromagnetic materials. Background technique [0002] When high-speed charged particles travel through the medium, when the particle velocity is greater than the phase velocity in the medium, a special kind of radiation, Cherenkov radiation, is excited. This kind of radiation was discovered by Russian physicist P.A. Cherenkov in 1934. In 1937, Russian physicists I.M. Frank and I.E. Tam successfully explained the cause of Cherenkov radiation. Cherenkov radiation is a kind of strongly polarized radiation. The radiation field it forms will be concentrated in a cone-shaped area behind the particle. This is the trail formed by the interference of waves radiated by the charged particles at various points on their trajectory. Moreover, the angle θ between the direction of the radiation wave and the direction of particle movem...

AI Technical Summary

Problems solved by technology

According to the principle of optical reciprocity, especially in the design of surface plasmon functional devices, the efficient conversion of space waves and surface plasmon waves is a very critical technical difficulty; due to the current low conversion efficiency, this is very important To a certain extent, the development and application of surface plasmon devices are limited

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