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Ultracompact and silicon-on-insulator-compatible polarization splitter based on asymmetric plasmonic–dielectric coupling

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Abstract

An ultracompact and silicon-on-insulator-compatible polarization splitter (PS) is proposed by utilizing asymmetric directional coupling between a hybrid plasmonic waveguide and a strip dielectric waveguide. Owing to the plasmon-assisted asymmetry, birefringence is highly enhanced. Polarization splitting can be realized by strong coupling of one polarization while the other polarization is phase-mismatched. As an example, a PS based on strong TM coupling is demonstrated at the wavelength of 1.55 μm with a coupling length of 4.13 μm. Extinction ratios are 20.9 and 16.4 dB for TM and TE polarizations, respectively. The device is also broadband and fabrication-tolerant.

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Acknowledgments

This work was partially supported by the Peking University 985 startup fund.

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Authors and Affiliations

  1. State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, 100871, China

    Linfei Gao, Feifei Hu, Xingjun Wang, Liangxiao Tang & Zhiping Zhou

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  1. Linfei Gao
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  2. Feifei Hu
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  3. Xingjun Wang
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  4. Liangxiao Tang
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  5. Zhiping Zhou
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Correspondence to Zhiping Zhou.

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Gao, L., Hu, F., Wang, X. et al. Ultracompact and silicon-on-insulator-compatible polarization splitter based on asymmetric plasmonic–dielectric coupling. Appl. Phys. B 113, 199–203 (2013). https://doi.org/10.1007/s00340-013-5457-7

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  • DOI: https://doi.org/10.1007/s00340-013-5457-7

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