| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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All-Optical Modulation with a Surface Plasmon Mach-Zehnder Interferometer |
| WU Xiao-Fei, ZHANG Jia-Sen, LI Zhi, LIU Ying-Liang, GONG Qi-Huang |
| State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 |
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| Cite this article: |
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WU Xiao-Fei, ZHANG Jia-Sen, LI Zhi et al 2009 Chin. Phys. Lett. 26 057302 |
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Abstract We use two parallel nano-slits in a silver film to form a surface plasmon Mach-Zehnder interferometer (MZI), based on the interference of two surface plasmon waves propagating along the two surfaces of the silver film. Coating the silver film with a photoinduced birefringence polymer film, we achieve optical modulation of the MZI output by changing the refractive index of the polymer film with a pump beam. An on/off ratio of 2.7 is obtained for a probe wavelength of 865nm.
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| Keywords:
73.20.Mf
42.79.Hp
42.70.Jk
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Received: 05 September 2008
Published: 23 April 2009
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| PACS: |
73.20.Mf
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(Collective excitations (including excitons, polarons, plasmons and other charge-density excitations))
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42.79.Hp
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(Optical processors, correlators, and modulators)
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42.70.Jk
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(Polymers and organics)
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