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1 2020

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Investigation of coupling effect between a unidirectional air waveguide and two cavities with one-way rotating state

Gao Yongfeng, He Liu, Jiang Zhen, Zhou Jun, Shi Yuejia, Bai Wenfang

Optica Applicata

2020

Vol. 50, nr 1

49--59

In the paper we present an implementation of resonance coupling between a unidirectional air waveguide and two cavities with one-way rotating state in a two-dimensional dielectric photonic crystal and a magneto-optical photonic crystal. We theoretically calculate the dispersion curves of the line defect waveguide and the dispersion curves of waveguide-cavity interaction, respectively. Numerical simulations show that, via waveguide-cavity coupling, a series of interesting resonance phenomena can be generated in the system. By modifying direction of the applied external magnetic field, storing and discharging of photonic energy can be realized. Our work may provide a practical and useful guidance for optical communications.