Nanocavities fabricated in a metallic surface have important and technologically useful properties of complete light absorption and strong field enhancement. Here, we demonstrate how a nanometerthick alumina deposition inside such a cavity can be used to gain an exquisite control over the resonance wavelength. This process allows achieving a precise control over the spectral response and is completely reversible allowing many tuning attempts to be made on a single structure until the optimum performance is achieved.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3515806 | PMC |
| http://dx.doi.org/10.1038/srep00933 | DOI Listing |
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