Photonic crystal waveguide based superefficient compact T-shaped circulator

Abstract

The invention discloses a photonic crystal waveguide based superefficient compact T-shaped circulator. The photonic crystal waveguide based superefficient compact T-shaped circulator comprises a T-shaped photonic crystal waveguide with three end openings; a square magneto-optical dielectric rod is arranged in the center of the T-shaped photonic crystal waveguide; four square dielectric rods are arranged at four corners in the center of the crisscrossing waveguide; angles of the four square dielectric rods are cut to form into isosceles right triangles with the length of right angle sides to be identical to that of sides of background square dielectric rods to form into corner dielectric rods; the corner dielectric rods and left parts at corresponding lattice point positions of the corner dielectric rods are coincided or not; the insertion loss of the circulator is from 0.02db to 1db and the isolation of the two end openings is larger than 14db. The photonic crystal waveguide based superefficient compact T-shaped circulator has the advantages of being small in size, high in integration level, high in electromagnetic wave transmission efficiency, beneficial to integration and efficient and allowing circuiting and being widely applied to microwave, terahertz and light communication wave bands.

Description

technical field [0001] The invention relates to the field of three-port T-shaped circulators, in particular to a T-shaped circulator based on photonic crystal technology. Background technique [0002] In recent years, with the introduction of photonic crystal theory, photonic crystal waveguide is considered as a medium that can efficiently transmit electromagnetic waves. Therefore, the photonic crystal waveguide theory has opened up a new field for exploring high-efficiency microwave integrated circuits and integrated optical circuits. In microwave integrated circuits and integrated optical circuits, various echo interferences will inevitably occur between various components and affect the functions of the entire system. Therefore, minimizing these disturbances will be the top priority in optimizing the overall system. [0003] Since the birth of electromagnetism, circulators have been widely used for their unique functions. For example, when used as an isolator, the sign...

AI Technical Summary

Problems solved by technology

Although the circulators based on photonic crystal waveguides that have been designed are much smaller and have better performance than traditional magneto-optical circulators, most of the designs use multiple magneto-optic dielectric rods or coupled Dielectric column, so the structure is relatively complex and the bandwidth is relatively narrow

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