All-Optical Modulation with a Surface Plasmon Mach-Zehnder Interferometer |
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| Authors: | WU Xiao-Fei ZHANG Jia-Sen LI Zhi LIU Ying-Liang GONG Qi-Huang |
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| Affiliation: | State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871 |
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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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