DOIAbstract
针对常用的光学滤波器滤波波长不可变的特点,提出一种利用表面等离子体激元效应实现可调制滤波的方法.该方法根据金属邻近电介质的介电常数发生改变时,金属与入射光波的表面等离子体激元耦合共振模式发生改变,以此实现滤波波长调制.在加工有亚波长纳米孔阵列的Au薄膜上制作了一可见光滤波器,实验中采用空气、酒精和油作为介质对器件进行调制.结果表明:相对于常用的光学滤波器,该器件由于可以方便地改变临近介质的介电常数,因此具有滤波波长连续可调、快速方便、波长变化精度高等特点.Since the wavelength feature of an optical filter is fixed once it is made, surface plasmon polarition on a flat metal-dielectric interface is used to make a modulated filter. When light beam is focused on the metal-dielectric interface, the surface plasmon polarition (SPP) of metal-dielectric will be changed to modulate the wavelength of the filter by modulating the dielectric index of the dielectric layer. A modulated optical filter is fabricated on an Au film with a set of sub-wavelength nanometer hole arrays. I...
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