借助于二维时域有限差分(2D-FDTD)法，对Sinc形表面等离子滤波器在可见光波段的滤波特性进行了研究。结果表明：每条透射曲线均存在一个较宽的禁带。Sinc函数的高度、最大槽深和槽宽对禁带的位置影响较大，而主花瓣半宽、槽的周期数以及水平通道的宽度对禁带的位置影响较小。与1.55 μm波段相比，禁带的宽度要窄一些，而禁带两侧的通带也要低一些。研究结果可以为表面等离子滤波器的设计、制作和应用提供理论参考。

With two dimensional finite-difference time-domain (2D-FDTD) method, filter characteristics of a Sinc-shaped surface plasmonic filter are studied in the visible light band. The results show that, each transmission curve exists in a wide forbidden band, the position of the forbidden band is affected significantly by the height of the Sinc function, the maximum groove depth and the groove width, and weakly by the half-width of the main petal, the period of the slots and the horizontal groove width of the channel. Compared with 1.55 μm band, the width of the forbidden band is more narrow, and both sides of the passband band also are lower. This work would provide a theoretical reference for the design, production and application of surface plasma filters.