Angular Distribution of Surface-Enhanced Raman Scattering from Individual Au Nanoparticle Aggregates
Journal article, 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
Author
Timur Shegai
Chalmers, Applied Physics, Bionanophotonics
Björn Brian
Chalmers, Applied Physics, Bionanophotonics
Vladimir Miljkovic
Chalmers, Applied Physics, Bionanophotonics
Mikael Käll
Chalmers, Applied Physics, Bionanophotonics
ACS Nano
1936-0851 (ISSN) 1936-086X (eISSN)
Vol. 5 3 2036-2041Subject Categories
Chemical Sciences
DOI
10.1021/nn1031406