One-way wave guide device based on composite structures

Abstract

The invention relates to the field of micro / nano optical devices, and provides a one-way wave guide device based on composite structures for realizing asymmetric transmission of optical wave. The one-way wave guide device comprises a substrate and composite structures periodically arranged on the substrate; the composite structure comprises a dielectric cylinder and a metal disk above the dielectric cylinder; and the metal disks are used for allowing electromagnetic wave to produce plasma resonance or phonon resonance. The one-way wave guide device is suitable for an integrated photonic device, and can have a very good one-way conduction effect within a very wide wave band range by adjusting the arrangement period conforming to the results.

Description

technical field [0001] The invention relates to the field of micro-nano optical devices, in particular to a unidirectional waveguide device based on a composite structure. Background technique [0002] A unidirectional waveguide device is a reciprocal optical device used for one-way transmission of electromagnetic waves, and it has important application prospects in the fields of communication, optoelectronic integration, and optical transmission. Utilizing the magneto-optical rotation effect and the birefringence effect of crystals are the two basic principles of two classic realizations of unidirectional waveguide devices based on composite structures. However, limited by the performance of magneto-optical active materials and birefringent media in nature, the unidirectional waveguide devices based on the composite structure produced by these two classic principles are relatively large in size, and the performance and waveband range of unidirectional conduction are also ve...

AI Technical Summary

Problems solved by technology

[0008] (1) Traditional devices have complex structures and large volumes, making it impossible to miniaturize devices and be used in modern integrated photonic devices;

[0009] (2) The processing process of traditional devices is cumbersome and expensive;

[0010] (3) The working band of traditional devices processed by artificial electromagnetic structures is very narrow, which is not suitable for wide band requirements, and the ratio of forward and reverse transmittance is relatively small;

Under the irradiation of non-ideal polarized light, the energy utilization efficiency of the device is very low;

[0012] (5) The application range of traditional unidirectional waveguide devices based on composite structures is very narrow. For example, they cannot be applied to devices such as waveguides and solar cells that require efficient coupling and input of electromagnetic waves.

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