Journal
SCIENTIFIC REPORTS
Volume 3, Issue -, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/srep02867
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Funding
- National Science Foundation (NSF) [ECCS-0747560, ECCS-1201687]
- Harvard Quantum Optics Center
- Center for Excitonics, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science and Office of Basic Energy Sciences [DE-SC0001088]
- UT/ORNL Joint Institute for Advanced Materials
- U.S. Department of Energy, Office of Basic Energy Sciences [DESC0004792]
- National Science Foundation [CHE-0954297, DMR-0906752]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1201687] Funding Source: National Science Foundation
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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.
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