Improving the sensing performance of double gold gratings by oblique incident light

Here we demonstrate a simple method to improve the plasmonic sensing performance of gold gratings. The gratings consist of periodic polymer gratings covered with a gold layer, created by nanoimprint lithography and metal deposition. We investigated the effect of gold thickness and the incident angle...

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Bibliographic Details
Published inNanoscale Vol. 7; no. 30; pp. 13026 - 13032
Main Authors Wu, Feifei, Liu, Lingxiao, Feng, Lei, Xu, Daren, Lu, Nan
Format Journal Article
LanguageEnglish
Published England 14.08.2015
Subjects
Deposition
Detection
Gold
Incidence
Incident light
Lithography
Nanostructure
Plasmonics
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Summary:Here we demonstrate a simple method to improve the plasmonic sensing performance of gold gratings. The gratings consist of periodic polymer gratings covered with a gold layer, created by nanoimprint lithography and metal deposition. We investigated the effect of gold thickness and the incident angles on the plasmonic sensing performance. With the optimized gold layer, the full-width at half maximum of this grating was reduced by 60% by using the oblique incident light instead of the normal incident light. A maximum value of the figure of merit at oblique incidence is 12, which is double the one at normal incidence.
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ISSN:2040-3364
2040-3372
DOI:10.1039/c5nr02660a