Direct evidence for surface plasmon-mediated enhanced light transmission through metallic nanohole arrays

作者：Gao Hanwei; Henzie Joel; Odom Teri W^*

来源：Nano Letters, 2006, 6(9): 2104-2108.

DOI：10.1021/nl061670r

This paper provides direct evidence for the role of surface plasmons in the enhanced optical transmission of light through metallic nanoscale hole arrays. Near-field optical images directly confirmed the presence of surface plasmons on gold nanohole arrays with interhole spacings larger than the surface plasmon wavelength. A simple interference model provides an intuitive explanation of the two types of fringe wavelengths observed in the near-field optical images. Far-field spectroscopy revealed a surface plasmon band that contributed a factor > 8 to the transmission enhancement. Furthermore, silicon nanohole arrays did not exhibit any features in the near-field, which demonstrates that metallic materials are necessary for enhanced light transmission through nanohole arrays.

• 出版日期2006-9-13
• 单位西北大学