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 2036-2041

Ämneskategorier

Kemi

DOI

10.1021/nn1031406