Mapping the polarization pattern of plasmon modes reveals nanoparticle symmetry.
We study the wavelength and polarization dependent plasmon resonances of single silver and gold nanorods, triangles, cubes, and dimers with a novel single particle spectroscopy method (RotPOL). In RotPOL, a rotating wedge-shaped polarizer encodes the full polarization information of each particle within one image. This reveals the symmetry of the particles and their plasmon modes, allows analyzing inhomogeneous samples and the monitoring of particle shape changes during growth in situ.
Schubert
Olaf
O
Institute of Physical Chemistry, University of Mainz, Mainz, Germany.
Becker
Jan
J
Carbone
Luigi
L
Khalavka
Yuriy
Y
Provalska
Tetyana
T
Zins
Inga
I
Sönnichsen
Carsten
C
D016880:Anisotropy; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D046529:Microscopy, Electron, Transmission; D012834:Silver / Q000737:chemistry*
D012834:Silver; D006046:Gold