期刊
NANO LETTERS
卷 10, 期 2, 页码 652-656出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl9037505
关键词
Near-held optical imaging; nanoplasmonics; optical antennas; inverse scattering; nanoparticles
类别
资金
- National Science Foundation [ECCS-0651079]
The control of optical fields on the nanometer scale is a central theme of plasmonics and nanophotonics. Methods for characterizing localized optical Field distributions are necessary to validate theoretical predictions, to test nanofabrication procedures, and to provide feedback for design improvements. Typical methods of probing near fields (e,g., single molecule Fluorescence and near-field microscopy) cannot probe both the complex-valued and vectorial nature of the field distributions. We demonstrate that a nanoparticle probe with isotropic polarizability in combination with polarization control of excitation and detection beams provides access to. this information through the interaction censor. For a sample consisting of a single nanoparticle we show that the recorded images correspond to maps of the local Green's function censor elements that couple the probe and sample. The censorial mapping of interacting nanciparticles is of interest for optical sensing, optical antennas, surface-enhanced Raman scattering, nonlinear optics, and molecular rulers.
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