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All-Optical Tunable Wavelength-Division Multiplexing Based on Colloidal Crystal Coated Silver Film

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Abstract

An all-optical tunable nanoscale wavelength-division multiplexing device is realized theoretically based on a plasmonic microstructure, which is composed of a silver film coated with a monolayer colloidal crystal made of cholesteryl iodide-doped polystyrene. The physical mechanism is attributed to the variation of surface plasmon polariton modes and guided modes caused by pump-laser-induced refractive index change of cholesteryl iodide. An up to 90-nm shift in the resonant wavelength of optical channels can be reached under excitation of a 500 mJ/cm2 pump laser. The number of optical channels can be tuned by adjusting the structure parameters of the monolayer colloidal crystal. This may open a new way for the study of integrated photonic devices.

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Acknowledgments

This work was supported by the National Basic Research Program of China under grant 2007CB307001, the National Natural Science Foundation of China under grants 61077027, 10874010, 11121091, and 90921008, and the program for New Century Excellent Talents in University.

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Authors and Affiliations

  1. State Key Laboratory for Mesoscopic Physics & Department of Physics, Peking University, Beijing, 100871, People’s Republic of China

    Yu Zhu, Xiaoyong Hu, Cuicui Lu, Yongyang Huang & Qihuang Gong

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  1. Yu Zhu
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  2. Xiaoyong Hu
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  3. Cuicui Lu
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  4. Yongyang Huang
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  5. Qihuang Gong
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Correspondence to Xiaoyong Hu or Qihuang Gong.

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Zhu, Y., Hu, X., Lu, C. et al. All-Optical Tunable Wavelength-Division Multiplexing Based on Colloidal Crystal Coated Silver Film. Plasmonics 7, 589–594 (2012). https://doi.org/10.1007/s11468-012-9346-4

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  • DOI: https://doi.org/10.1007/s11468-012-9346-4

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