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

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 colloid

SUBMITTER: Wang D 

PROVIDER: S-EPMC3790206 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature