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Observation of surface-plasmon-polariton transmission through a silver film sputtered on a photorefractive substrate

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8 Author(s)
Chen, Jing ; The Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Nankai University, Tianjin 300457, China and The Tianjin Key Laboratory of Photonics Materials and Technique, Nankai University, Tianjin 300457, China ; Li, Yudong ; Wenqiang Lu ; Qi, Jiwei
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The diffraction of holographic gratings in a photorefractive iron-doped lithium niobate (LiNbO3:Fe) crystal, on which surface a silver film was sputtered, was experimentally investigated. Besides the Bragg diffraction, an additional diffraction was observed. The experimental results present evidence of surface-plasmon-polariton (SPP) transmission through the silver film on the photorefractive substrate. The excitation of SPPs is speculated to be due to the corrugations of the silver film, which are caused by the photorefractive and the converse piezoelectric effect in the LiNbO3:Fe sample.

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Journal of Applied Physics  (Volume:102 ,  Issue: 11 )