Dependence of Surface Plasmons on Unit Structure Edge Sharp Features

作者：Sheng, Jiabing; Yuan, Zhi; Chen, Zhiyong^*; Zhu, Weihua; Guo, Wei; He, Hongyu; Wang, Xinlin^*

来源：Plasmonics, 2017, 12(3): 795-801.

DOI：10.1007/s11468-016-0326-y

• Subwavelength metallic film hole arrays
• Enhanced optical transmission
• Finite-difference

The relation between the enhanced optical transmission and the unit structural features is studied by changing the unit structural features. 3D finite-difference time-domain method is employed to study the enhanced optical transmission of periodic subwavelength circular-sharps shaped hole arrays in metallic films which are deposited on a quartz substrate. The influences of the unit structural features on the enhanced optical transmission are investigated. It is found that the enhanced optical transmission strongly depends on the unit structural edge sharp features: the sharp acuity, numbers, and distributions. The sharp acuity and numbers influence the enhanced optical transmission via localized surface plasmon resonance mode. The sharp distributions affect the enhanced optical transmission equaling to the effect of polarization properties. The results show that the surface plasmons strongly depend on unit structure edge sharp features. Changing the unit structural edge sharp features, the properties of the enhanced optical transmission can be tailored. This paper provides theoretical support for building the various functions of new plasmonic devices.

• 出版日期2017-6
• 单位南华大学