All-optical diode with adjustable light transmission direction based on Faraday law of electromagnetic induction

Abstract

The invention relates to an all-optical diode and particularly relates to an all-optical diode with an adjustable light transmission direction based on the Faraday law of electromagnetic induction. The all-optical diode comprises a magneto-optical material and a metal nanowire, wherein the metal nanowire is embedded in the magneto-optical material, a beam of laser is focused in the middle of the metal nanowire, and the two ends of the metal nanowire are connected with the positive electrode and the negative electrode of a direct-current power supply (DC). The all-optical diode is based on theFaraday law of electromagnetic induction and the surface plasma resonance technology, the propagation direction of a light source can be effectively modulated, the radius of equipment can be limited to the nanoscale, and theoretical guidance is provided for achieving the all-optical diode with the controllable light transmission direction. Important reference value is achieved for widening the application field of surface plasma resonance and improving the working stability of the photodiode.

Description

Technical field: [0001] The invention relates to a plenoptic diode, in particular to a plenoptic diode with adjustable light transmission direction based on Faraday's law of electromagnetic induction. Background technique: [0002] The most basic device on an integrated photonic circuit is an all-photodiode. Compared with electrons, photons have the characteristics of no rest mass and fast propagation speed. Relatively speaking, the speed of information transmission of all-optical diodes will far exceed that of diodes that are widely used today. Therefore, if a photodiode that can be dynamically modulated can be manufactured, it will be of great significance for the preparation of complex photonic circuits in the future. Traditional photodiodes are mainly based on photonic crystal structures, including photonic crystal heterojunctions, photonic crystal waveguides, and photonic crystal fibers. In recent years, many new structures have also achieved the purpose of suppressin...

AI Technical Summary

Problems solved by technology

In 2015, a Bragg grating shaped like a sandwich structure was used to realize the unidirectional transmission of light and obtained a high transmission contrast, and the light was almost completely suppressed in the reverse propagation, but the preparation process was extremely complicated and required the assistance of a special light source

Considering the anisotropic relative permittivity of magneto-optical (MO) materials, some optically nonreciprocal devices have been fabricated based on the magneto-optic effect, but these devices have not found an efficient way to modulate the propagation of light. direction

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