• Chinese Optics Letters
  • Vol. 15, Issue 11, 111601 (2017)
Yong Wang1, Dengguo Zhang2、*, Shixiang Xu2, Biaogang Xu2, and Zheng Dong2
Author Affiliations
  • 1College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
  • 2College of Electronic Science and Technology, Shenzhen University, Shenzhen 518060, China
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    DOI: 10.3788/COL201715.111601 Cite this Article Set citation alerts
    Yong Wang, Dengguo Zhang, Shixiang Xu, Biaogang Xu, Zheng Dong. H-plane cross-shaped waveguide circulator in magneto-photonic crystals with five ferrite posts[J]. Chinese Optics Letters, 2017, 15(11): 111601 Copy Citation Text show less

    Abstract

    A novel H-plane cross-shaped circulator based on magneto-photonic crystals is experimentally investigated. The band gap of the TE mode for the photonic crystals is calculated by the plane wave expansion method. The transmission characteristics of the circulator are simulated by the finite element method. We perform the experiments in the microwave regime to validate the numerical results. At the central frequency of 10.15 GHz, the measured isolation and insertion loss of the circulator reaches 30.2 and 3.93 dB, respectively. The bandwidth of the circulator is about 550 MHz. The optimal experimental value of isolation is higher than the numerical value.
    [μr]=μ0[μjκ0jκμ0001],(1)

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    μ=1+ω0ωmω02ω2,(2)

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    κ=ωωmω02ω2,(3)

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    ω0=μ0γH0,(4)

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    ωm=μ0γMs,(5)

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    R=x/{(2πf0εf/299.793)2[(π/lf)×1.5]2}1/2,(6)

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    S21=10lg(P21/P1),(7)

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    S12=10lg(P12/P2),(8)

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    τBA=S21=10lg(P21/P1),(9)

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    αAB=S12=10lg(P12/P1).(10)

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    Yong Wang, Dengguo Zhang, Shixiang Xu, Biaogang Xu, Zheng Dong. H-plane cross-shaped waveguide circulator in magneto-photonic crystals with five ferrite posts[J]. Chinese Optics Letters, 2017, 15(11): 111601
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