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Issue 14, 2014
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Enhanced extraordinary optical transmission (EOT) through arrays of bridged nanohole pairs and their sensing applications

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Abstract

Extraordinary optical transmission (EOT) through arrays of gold nanoholes was studied with light across the visible to the near-infrared spectrum. The EOT effect was found to be improved by bridging pairs of nanoholes due to the concentration of the electromagnetic field in the slit between the holes. The geometrical shape and separation of the holes in these pairs of nanoholes affected the intensity of the transmission and the wavelength of resonance. Changing the geometrical shapes of these nanohole pairs from triangles to circles to squares leads to increased transmission intensity as well as red-shifting resonance wavelengths. The performance of bridged nanohole pairs as a plasmonic sensor was investigated. The bridged nanohole pairs were able to distinguish methanol, olive oil and microscope immersion oil for the different surface plasmon resonance in transmission spectra. Numerical simulation results were in agreement with experimental observations.

Graphical abstract: Enhanced extraordinary optical transmission (EOT) through arrays of bridged nanohole pairs and their sensing applications

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Publication details

The article was received on 23 Feb 2014, accepted on 05 May 2014 and first published on 08 May 2014


Article type: Paper
DOI: 10.1039/C4NR01001A
Citation: Nanoscale, 2014,6, 7917-7923
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    Enhanced extraordinary optical transmission (EOT) through arrays of bridged nanohole pairs and their sensing applications

    W. Yue, Z. Wang, Y. Yang, J. Li, Y. Wu, L. Chen, B. Ooi, X. Wang and X. Zhang, Nanoscale, 2014, 6, 7917
    DOI: 10.1039/C4NR01001A

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