Wafer-scale metasurface for total power absorption, local field enhancement and single molecule Raman spectroscopy

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Wafer-scale metasurface for total power absorption, local field enhancement and single molecule Raman spectroscopy

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Title: Wafer-scale metasurface for total power absorption, local field enhancement and single molecule Raman spectroscopy
Author: Wang, Dongxing; Zhu, Wenqi; Best, Michael D.; Camden, Jon P.; Crozier, Kenneth B.

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Citation: Wang, Dongxing, Wenqi Zhu, Michael D. Best, Jon P. Camden, and Kenneth B. Crozier. 2013. “Wafer-scale metasurface for total power absorption, local field enhancement and single molecule Raman spectroscopy.” Scientific Reports 3 (1): 2867. doi:10.1038/srep02867. http://dx.doi.org/10.1038/srep02867.
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Abstract: The ability to detect molecules at low concentrations is highly desired for applications that range from basic science to healthcare. Considerable interest also exists for ultrathin materials with high optical absorption, e.g. for microbolometers and thermal emitters. Metal nanostructures present opportunities to achieve both purposes. Metal nanoparticles can generate gigantic field enhancements, sufficient for the Raman spectroscopy of single molecules. Thin layers containing metal nanostructures (“metasurfaces”) can achieve near-total power absorption at visible and near-infrared wavelengths. Thus far, however, both aims (i.e. single molecule Raman and total power absorption) have only been achieved using metal nanostructures produced by techniques (high resolution lithography or colloidal synthesis) that are complex and/or difficult to implement over large areas. Here, we demonstrate a metasurface that achieves the near-perfect absorption of visible-wavelength light and enables the Raman spectroscopy of single molecules. Our metasurface is fabricated using thin film depositions, and is of unprecedented (wafer-scale) extent.
Published Version: doi:10.1038/srep02867
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3790206/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11878868
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