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Angular Distribution of Surface-Enhanced Raman Scattering from Individual Au Nanoparticle Aggregates

Timur Shegai (Institutionen för teknisk fysik, Bionanofotonik) ; Björn Brian (Institutionen för teknisk fysik, Bionanofotonik) ; Vladimir D. Miljkovic (Institutionen för teknisk fysik, Bionanofotonik) ; Mikael Käll (Institutionen för teknisk fysik, Bionanofotonik)
ACS Nano (1936-0851). Vol. 5 (2011), 3, p. 2036-2041.
[Artikel, refereegranskad vetenskaplig]

Nano-optical antennas based on plasmonic metal particles are well-known for their ability to dramatically concentrate electromagnetic energy. However, not much attention has been devoted to the directionality properties of nanoantennas. Here, we report on the angular distribution of surface-enhanced Raman scattering (SERS) emitted by isolated aggregates of gold nanoparticles. We find that most of the radiation appears at angles exceeding the critical angle of the air-glass interface supporting the aggregates, and we demonstrate that angle-resolved imaging can be used as a fast and facile method for determination of the three-dimensional orientation and symmetry of the nanoantenna.

Nyckelord: nanoantenna, surface-enhanced Raman scattering, Fourier imaging, spectroscopy, emission, polarization, molecules, light, sers, nanoantennas

Denna post skapades 2011-04-12. Senast ändrad 2015-12-17.
CPL Pubid: 138967


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Institutionen för teknisk fysik, Bionanofotonik (2007-2015)



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