Angular Distribution of Surface-Enhanced Raman Scattering from Individual Au Nanoparticle Aggregates
Artikel i vetenskaplig tidskrift, 2011
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.
molecules
surface-enhanced Raman scattering
Fourier imaging
sers
spectroscopy
emission
polarization
nanoantennas
light
nanoantenna
Författare
Timur Shegai
Chalmers, Teknisk fysik, Bionanofotonik
Björn Brian
Chalmers, Teknisk fysik, Bionanofotonik
Vladimir Miljkovic
Chalmers, Teknisk fysik, Bionanofotonik
Mikael Käll
Chalmers, Teknisk fysik, Bionanofotonik
ACS Nano
1936-0851 (ISSN) 1936-086X (eISSN)
Vol. 5 3 2036-2041Ämneskategorier
Kemi
DOI
10.1021/nn1031406