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A T-shaped defect structure based on two-dimensional square-lattice magneto-photonic pillar array is proposed and a novel compact waveguide circulator using cylindrical ferrite rods is numerically investigated. Under a bias DC magnetic field, the ferrite rod in the central point of defect structure can provide Faraday rotation External characteristics of the circulator are calculated by finite element method and the numerical results show that the isolation is 25.92dB and insertion loss is 0.064dB. Furthermore, according to the scaling theory of Maxwell’s equations, a 3 cm T-junction circulator is developed by scaling the radius of the central ferrite cylinder..
Photonic crystal, Photonic device, Circulator, Ferrite, Optical integrated circuits.
YONG WANG, DENGGUO ZHANG, SHIXIANG XU, BIAOGANG XU, ZHENG DONG, TAN HUANG, Compact waveguide circulator based on T-shaped magneto-photonic crystal pillar array, Optoelectronics and Advanced Materials - Rapid Communications, 12, 5-6, May-June 2018, pp.283-288 (2018).
Submitted at: March 16, 2017
Accepted at: June 7, 2018