Electromagnetic modulator and multifunctional modulation method based on plasmonic metamaterials

Abstract

The invention discloses an electromagnetic modulator based on plasma metamaterials and a multifunctional modulation method. Four upper surface open resonant rings are arranged on the upper surface of the substrate with 90-degree rotational symmetry with respect to the center of the substrate, and four upper surface open resonant rings are arranged between the four upper surface open resonant rings. A cross-shaped metal transverse line is set, and four lower-surface-opening resonant rings with 90-degree rotational symmetry about the center are arranged on the lower surface of the substrate corresponding to the four upper-surface resonant rings. By controlling the excitation state of the solid-state plasmon resonance branches in different regions, the function of the present invention can be freely switched between the electromagnetically induced transparency and the isolator, wherein the two transmission windows of the electromagnetically induced transparency both exhibit good slow-wave characteristics, At the same time, combined with the isolator, we can realize the conversion of multiple frequency points between the transmission peak and the transmission valley, so as to realize the "on / off" modulation of electromagnetic wave transmission.

Description

Electromagnetic modulator and multifunctional modulation method based on plasmonic metamaterial technical field The present invention relates to the practical technology and device technical field of solid-state plasma and electromagnetic modulator, especially based on Electromagnetic modulators and multifunctional modulation methods of plasmonic metamaterials. Background technique Electromagnetic metamaterials, also known as metamaterials, have artificially designed structures and present natural It is a composite material with extraordinary physical properties that is difficult for natural materials to possess. Since electromagnetic metamaterials have different electromagnetic Therefore, it has received considerable attention and applications in the research fields of solid state physics, materials science, optics, and electromagnetism. It is one of the hot research questions at the moment. Due to its unique electromagnetic properties, metamaterials have derived ...

AI Technical Summary

Problems solved by technology

[0007] On the one hand, the present invention aims to solve the technical problem in the prior art that the transparent windows of the electromagnetically induced transparent device based on metamaterials are all in a single frequency range, and provides an electromagnetic modulator based on plasma metamaterials. In order to achieve the above technical purposes, The present invention adopts following technical scheme:

Images