MAGNETIC SURFACE FAST-MODE ARBITRARY-DIRECTION CONTROLLABLE UNIDIRECTIONAL BEND WAVEGUIDE WITH LOW-LOSS MAGNETO-OPTIC GAP

摘要

Disclosed is a magnetic surface fast-mode arbitrary-direction controllable unidirectional bend waveguide with a low-loss magneto-optic gap. The unidirectional bend waveguide comprises an optical input port (1), an optical output port (2), magneto-optic material layers (3, 4), a dielectric layer (5) and two direction-controllable bias magnetic fields (H₀) in opposite directions. The magneto-optic material layers (3, 4) and the dielectric layer (5) are an optical waveguide of a three-layer structure, wherein the three-layer structure is bend-shaped at an arbitrary angle. The magneto-optic material layers (3, 4) are provided with the two direction-controllable bias magnetic fields (H₀) in opposite directions. The dielectric layer (5) is in a gap between the magneto-optic material layers (3, 4). A port of the unidirectional bend waveguide is the optical input port (1), and a right port thereof is the optical output port (2). The dielectric layer (5) is in the shape of a circular ring at a waveguide bending portion. Magnetic surface fast waves are on surfaces of the magneto-optic material layers (3, 4) and the dielectric layer (5). The unidirectional bend waveguide has a simple structure, has low loss and has high transmission efficiency, and is applicable to large-scale optical path integration.