Quantitative analysis of localized surface plasmons based on molecular probing.
basic_science · Level V
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- Record sourced from PubMed, PMID 20687536.
- Also identified by DOI 10.1021/nn101017b.
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Abstract
We report on the quantitative characterization of the plasmonic optical near-field of a single silver nanoparticle. Our approach relies on nanoscale molecular molding of the confined electromagnetic field by photoactivated molecules. We were able to directly image the dipolar profile of the near-field distribution with a resolution better than 10 nm and to quantify the near-field depth and its enhancement factor. A single nanoparticle spectral signature was also assessed. This quantitative characterization constitutes a prerequisite for developing nanophotonic applications.