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Cited by 252

The DOI matches its Crossref record; 36 of the 36 references it cites were found in a registry or an index.

Resolving the electromagnetic mechanism of surface-enhanced light scattering at single hot spots

Open access
Alonso-González, P., Albella, P., Schnell, M., Chen, J., Huth, F., García-Etxarri, A., Casanova, F., Golmar, F., Arzubiaga, L., Hueso, L.E., Aizpurua, J., Hillenbrand, R.·2012·Nature Communications

Abstract

Light scattering at nanoparticles and molecules can be dramatically enhanced in the 'hot spots' of optical antennas, where the incident light is highly concentrated. Although this effect is widely applied in surface-enhanced optical sensing, spectroscopy and microscopy, the underlying electromagnetic mechanism of the signal enhancement is challenging to trace experimentally. Here we study elastically scattered light from an individual object located in the well-defined hot spot of single antennas, as a new approach to resolve the role of the antenna in the scattering process. We provide experimental evidence that the intensity elastically scattered off the object scales with the fourth power of the local field enhancement provided by the antenna, and that the underlying electromagnetic mechanism is identical to the one commonly accepted in surface-enhanced Raman scattering. We also measure the phase shift of the scattered light, which provides a novel and unambiguous fingerprint of surface-enhanced light scattering. Light scattering from nanoscale objects can be dramatically enhanced in the proximity of optical antennas. Here, by studying the amplitude and phase of the light scattered from a tip located at the hot spot of an antenna, the underlying electromagnetic mechanism of this enhancement is resolved.

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Crossref · 10.1038/ncomms1674

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Metadata

Authors
Alonso-González, P., Albella, P., Schnell, M., Chen, J., Huth, F., García-Etxarri, A., Casanova, F., Golmar, F., Arzubiaga, L., Hueso, L. E., Aizpurua, J., & Hillenbrand, R.
Venue
Nature Communications
Published
2012-02-21
Volume
3
Issue
1
Pages
684-684
ISSN
2041-1723 (ISSN-L)
OpenAlex
W1967351828
Cited by
252
References
36
FWCI
16.04
Type
journal article
Language
en
Open access
hybrid

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