利用有限时域差分法论分析了纳米尺度下狭缝的近场衍射,获得纳米尺度下单缝和三缝的近场衍射光强分布.通过模拟计算纳米尺度下狭缝近场衍射的一般规律,讨论了狭缝宽度和缝间距变化对近场衍射分布的影响,并纳米尺度下狭缝的近场传输特性进行了解释.
Utilized the finite difference time domain (FDTD) method, the near - field diffraction of nano - structure is analyzed to obtain the intensity of light offside one - nanoslit and tris- nanoslit. By simulating the near - field diffraction of slits to find the general laws, the effect of the slit width and slit spacing on the near - field dif- fraction is discussed, and the near -field transmission characteristic of nanoslit is explained.