Photonic crystal magneto-optical circulator and preparation method thereof

Abstract

The invention relates to a photonic crystal magneto-optical circulator comprising a first medium material columns in an air background, the first medium material columns are arranged in the shape of two-dimensional tetragonal lattice; the photonic crystal magneto-optical circulator also comprises a photonic crystal waveguide which includes a transverse photonic crystal waveguide and a longitudinal photonic crystal waveguide which are mutually intercrossed, a second medium material column used for guiding light and positioned at the cross connection of the transverse photonic crystal waveguideand the longitudinal photonic crystal waveguide, four identical magneto-optical material columns uniformly positioned around the second medium material columns, and at least three identical third medium material columns respectively positioned outside the three magneto-optical material columns. The photonic crystal magneto-optical circulator provided by the invention can respectively realize single direction optical circulating transmission among three ports arranged in the shape of T and among four ports arranged in the shape of a cross. The photonic crystal magneto-optical circulator provided by the invention is advantageous in that it has a concise form and a compact structure, and is suitable for serving as an anti-interference component in a photonic crystal integrated optical circuit.

Description

technical field [0001] The invention belongs to the technical field of photonic crystal integrated devices, and relates to a two-dimensional photonic crystal "T"-shaped three-port, "ten"-shaped four-port magneto-optical circulator and a manufacturing method thereof. Background technique [0002] Magneto-optical circulator is a key device in integrated optics to reduce optical signal crosstalk and improve component integration. Magneto-optical circulators use the unique non-reciprocal properties of magneto-optical materials to realize unidirectional circular transmission of optical signals between channels, so as to prevent signal reflection, eliminate signal crosstalk, and ensure the normal operation of the optical system. It is an integrated optical circuit. Indispensable performance optimization components. [0003] At present, the use of photonic crystal all-optical logic elements to realize the complex optical path of different functional integration is in hot research,...

AI Technical Summary

Problems solved by technology

[0004] Existing photonic crystal logic elements are basically realized in the air substrate-dielectric column structure (tetragonal lattice arrangement), [relative to the dielectric substrate-air column structure, the TE mode of the air substrate-dielectric column structure Deep bandgap (the advantage of deep bandgap is: under the same performance index, the size of the photonic crystal required is small, and it is easy to increase the integration level), avoiding the interference of TM mode, excellent working characteristics, and simple structure, It is easy to design and manufacture], and the existing photonic crystal circulators are basically realized in the dielectric substrate-air column structure (hexagonal lattice arrangement), and there are certain limitations in its application range

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