Photonic crystal waveguide based superefficient compact cross circulator

Abstract

The invention discloses a photonic crystal waveguide based superefficient compact cross circulator. The photonic crystal waveguide based superefficient compact cross circulator comprises a crisscrossing photonic crystal waveguide with four end openings; a square magneto-optical dielectric rod is arranged in the center of the crisscrossing 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 an isolation end and an input end is larger than 14db. The photonic crystal waveguide based superefficient compact cross 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 four-port cruciform circulators, in particular to a cruciform circulator based on photonic crystal technology. Background technique [0002] Since the birth of electromagnetics, circulators have been widely used for their unique functions. The circulator can be applied to different bands and devices according to different purposes. For example, when used as an isolator, the signal can only propagate in one direction by shielding the signal from the output end; in radar technology, the circulator can circulate the signal from the transmitter to the antenna, and then from the antenna to the receiver , And realize the function of the duplexer; in the reflection amplifier, the circulator as a non-reciprocal device can separate the amplified output signal from the input end. [0003] In recent years, with the introduction of the photonic crystal theory, the photonic crystal waveguide is considered to be a medium that can eff...

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, and directly interacts with the wave front, so the structure is relatively complex and the bandwidth is relatively narrow

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