中文摘要：

通过对亚波长金属光栅的可见光波段的光谱特性及其近场强度分布进行研究,采用Comsol软件仿真了结构参数变化对光谱和强度分布的影响。研究结果表明,亚波长金属光栅具有共振吸收谱,在吸收率峰值处,表现出亚波长金属结构表面等离激元的驻波模式,并在适当的参数下,得到了一种暗中空光场模式,利用该暗中空光场模式可以实现基于亚波长光栅的原子囚禁与导引。研究结果为亚波长光栅的理论研究以及亚波长光栅器件研究的实用化提供了参考。

英文摘要：

In this paper,the spectral characteristics and the near field intensity distribution of the visible band of the subwavelength metallic grating are studied,Influence of structural parameters on the spectrum and intensity distribution are studied by using the COMSOL multi physical field coupling method. It is found that the subwavelength metallic grating has the resonance absorption spectrum,at the peak of absorption rate,it exhibits a standing wave pattern of surface plasmons. By choosing appropriate structure parameters,a dark hollow mode is obtained,and it can be used to realize atomic trapping and guiding based on the subwavelength grating. Our result has a certain reference significance for the theory research and the application of the subwavelength grating.