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Broadband six-port circulator based on magneto-optical-rod ring in photonic crystal

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Abstract

We theoretically present the model of six-port circulator with a ring of magneto-optical rods symmetrically coupled to the waveguides in a two-dimensional triangle-lattice photonic crystal. Coupled mode theory is used to predict the broadband condition. It is shown that the rod–waveguide coupling should be equal to the rod–rod coupling in the structure, in order to obtain excellent performance of device in a relatively large bandwidth. According to the analytical results, the circulator is optimized and its properties are investigated. The results show that the insertion loss of the circulator can reach to 0.017 dB and isolations for the isolated ports are all above 29 dB. The broadband, low insertion loss, high-isolation circulator with multiple ports presented here is compact in structure and appropriate for optical integrated systems and wavelength division multiplexing applications.

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Acknowledgments

We thank the supports from the National Natural Science Foundation of China (NSFC, Grant Nos. 61275043, 61307048 and 11404220), Shenzhen Kexin Ju funds (Grant Nos. CXB201105050064A and JCYJ20140828163633988), Natural Science Foundation of SZU (Grant No. 201456) and Open Fund of Shenzhen Key Lab of Micro-Nano Photonic Information Technology (Grant No. 201406).

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Authors and Affiliations

  1. THz Technical Research Center and College of Electronic Science and Technology, Shenzhen University, Shenzhen, 518060, China

    Qiong Wang, Zhengbiao Ouyang, Yaoxian Zheng, Mi Lin & Guoliang Zheng

  2. Shenzhen Key Laboratory of Micro-Nano Photonic Information Technology, Shenzhen, 518060, China

    Qiong Wang, Zhengbiao Ouyang, Yaoxian Zheng, Mi Lin & Guoliang Zheng

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  1. Qiong Wang
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  2. Zhengbiao Ouyang
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  3. Yaoxian Zheng
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  4. Mi Lin
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  5. Guoliang Zheng
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Correspondence to Zhengbiao Ouyang.

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Wang, Q., Ouyang, Z., Zheng, Y. et al. Broadband six-port circulator based on magneto-optical-rod ring in photonic crystal. Appl. Phys. B 121, 385–389 (2015). https://doi.org/10.1007/s00340-015-6241-7

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  • DOI: https://doi.org/10.1007/s00340-015-6241-7

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