A defect magneto-photonic crystal with non-reciprocity properties and its application

Abstract

The invention discloses a defective magneto photon crystal with a non-reciprocity feature and a purpose. The defective magneto photon crystal with the non-reciprocity feature comprises a one-dimensional magneto photon crystal and a magneto-optic material defect layer, the one-dimensional photon crystal is composed of magneto-optic material A and isotropic medium material B in an alternation mode, and the magneto-optic material C located at the middle of the structure is a magneto-optic material defect layer. The structure of the defective magneto photon crystal with the non-reciprocity feature is [A / B]m[C][A / B]mA, wherein the dielectric tensor of the magneto-optic medium is epsilon a, FORMULAE (as shown in the description), the thickness da is equal to 69.3 nanometers, the dielectric constant of the medium layer B is epsilon b=4, db is equal to 152.8 nanometers, the lattice period is d=da+db=222.1 nanometers, the dielectric tensor of the defect layer C is epsilon c, FORMULAE (as shown in the description), wherein m is the periodicity of the photon crystal, and m is equal to 13. The defective magneto photon crystal with the non-reciprocity feature is featured with simple structure, easiness in technique, strong functionality and the like, the design is flexible, and the application prospect is broad in opto-isolators, optical circulators and the like aspects.

Description

technical field [0001] The invention relates to the field of photonic crystal devices and magneto-optical technology, in particular to a defective magneto-photonic crystal based on the non-reciprocal structure of the magneto-photonic crystal and its application. Background technique [0002] Non-reciprocity means that electromagnetic waves traveling in two opposite directions in an object will exhibit different characteristics such as electromagnetic loss and phase shift. It has a wide range of applications in isolators and circulators. The general way to realize these devices is to use the non-reciprocal effect of magneto-optic materials to allow the mode of light waves to generate a phase deviation between forward and backward transmission, avoiding the reversibility of the optical path. The traditional non-reciprocity is mainly based on the bulk structure of magneto-optical materials. The device has a large volume and weight, poor stability and is not easy to integrate w...

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Problems solved by technology

However, it needs to be formed by power coupling with the input port and output port at both ends of the optical coupling structure through the optical coupling structure on one side. Optical coupling will cause energy loss and cannot achieve full transmission.

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