Triangular-guide-post-introduced wide band three-port optical circulator

Abstract

The invention discloses a triangular-guide-post-introduced wide band three-port optical circulator which comprises a two-dimension triangular crystal lattice photonic crystal formed by a first dielectric material column array in a background dielectric low in refractive index. The triangular-guide-post-introduced wide band three-port optical circulator further comprises three photonic crystal branch waveguides and three ports, wherein the three photonic crystal branch waveguides correspond to the three ports respectively, and the three ports are distributed in the periphery of a photonic crystal. A second dielectric material column is arranged at the crossed part of the central of the three photonic crystal branch waveguides, and three identical magneto-optic material columns are arranged on the periphery of the second dielectric material column and distributed on the periphery of the crossed center of the three branch waveguides in a 120-degree-angle rotation symmetric mode. Each magneto-optic material column is located on the central axis of the branch waveguide where the magneto-optic material column is located, an electromagnetic wave signal is input from any port and output from the adjacent next port, and another port is in an isolation state to conduct one-way optical circular transmission. The triangular-guide-post-introduced wide band three-port optical circulator is compact in structure and facilitates the integration of other photonic crystal devices.

Description

technical field [0001] The invention belongs to the technical field of miniature circulators, and in particular relates to a three-port photonic crystal magneto-optical circulator which introduces a triangular column to guide a plurality of coupled magneto-optical material columns. Background technique [0002] With the development of science and technology and economic technology, large-scale integrated optical system has been widely concerned and researched. In the optical circuit, the increase of the integration level will lead to a significant increase in signal interference between components. In severe cases, the optical circuit cannot even complete the normal logic function. [0003] For the miniaturization and integration of optical devices, photonic crystals have obvious advantages. Photonic crystal is a kind of micro-material whose permittivity or permeability is arranged periodically or quasi-periodically in space, which can prevent electromagnetic waves of a cer...

AI Technical Summary

Problems solved by technology

[0004] Several types of existing three-port photonic crystal magneto-optical circulators, whether based on air substrate-dielectric cylinder or dielectric substrate-air cylinder structure, people generally only use a single magneto-optical cavity or a single magneto-optical material column To achieve the non-reciprocal deflection of the electromagnetic wave propagation direction, they have certain limitations in work performance

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