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Volume 29 Issue 3
Sep.  2013
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Numerical simulation of Otto structure in surface plasma wave light modulator

  • 1.

    National Laboratory of Laser Technology, HUST, Wuhan 430074, China

  • On the foundation of frustrated total internal reflect ion (FTIR) light modulator,combining the character of surface plasma wave (SPW) which is excitated on the surface of metal and can be resonant with ppolari zation light and absorbs its energy,a modified type SPW light modulator of Otto structure is designed.In Otto structure,the reflectivity can be modulated by changing thickness of air gap or the angle of incidence.The numerical simulation is made in the situation of three kinds of metal:Cu,Al,Ag and two wavelengths:1.06 4μm,0.532μm,and the results show that modulate effect of the method of changi ng angle of incidence is better,0.5°of the angle change can result in reflectivity's variety value is above 0.9.
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  • [1] 张镇西,张智勇,程向明.FTIR-光调制器的理论探讨 [J].光学学报,1984,4(5):450～455.
    [2] 高治文,陈丽娜,赵景星 et al.表面等离激元共振 [J].大学物理实验,1994,7(2):1～4.
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    KRETSCHMANN E,RAETHER H.Radiative decay of non-radiativesurface plasmons excited by light [J].Z Naturforsch,1968,A23:2135～2136.
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    RAETHER H.Surface plasma oscillations and their applications [A].Physics of Thin Films [C].New York:Academic Press,1977.145～261.
    [5] CULSHAW B,DAKIN J.光纤传感器 [M].武汉:华中理工大学出版社,1997.203.
    [6] 唐晋发,顾培夫.薄膜光学与技术 [M].北京:机械工业出版社,1987.13～29.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Numerical simulation of Otto structure in surface plasma wave light modulator

    Corresponding author: ZHU Xiao, zx@mail.hust.edu.cn; 
  • 1. National Laboratory of Laser Technology, HUST, Wuhan 430074, China
  • Received Date: 2004-04-27
  • Available Online: 2005-05-25

Abstract: On the foundation of frustrated total internal reflect ion (FTIR) light modulator,combining the character of surface plasma wave (SPW) which is excitated on the surface of metal and can be resonant with ppolari zation light and absorbs its energy,a modified type SPW light modulator of Otto structure is designed.In Otto structure,the reflectivity can be modulated by changing thickness of air gap or the angle of incidence.The numerical simulation is made in the situation of three kinds of metal:Cu,Al,Ag and two wavelengths:1.06 4μm,0.532μm,and the results show that modulate effect of the method of changi ng angle of incidence is better,0.5°of the angle change can result in reflectivity's variety value is above 0.9.

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