Nano Archive

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

Gao, Hanwei and Henzie, Joel and Odom, Teri W. (2006) Direct evidence for surface plasmon-mediated enhanced light transmission through metallic nanohole arrays. NANO LETTERS, 6 (9). pp. 2104-2108.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl061670r

Abstract

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.

Item Type:Article
Subjects:Material Science > Nanostructured materials
Physical Science > Photonics
ID Code:3695
Deposited By:Farnush Anwar
Deposited On:22 Jan 2009 13:59
Last Modified:22 Jan 2009 13:59

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