Particle plasmon resonances in L-shaped gold nanoparticles.
We present an extensive experimental and theoretical study of the particle plasmon resonances of L-shaped gold nanoparticles. For the small characteristic size of the particles, we observe more higher-order resonances than previously from related shapes, and show that a short-wavelength resonance arises from the particle arm width and is not the suggested volume plasmon. We interpret the resonances through the local vector electric field in the structure and by fully taking into account the particle symmetry.
Husu
Hannu
H
1Department of Physics, Optics Laboratory, Tampere University of Technology, PO Box 692, FI-33101 Tampere, Finland. hannu.husu@tut.fi
Mäkitalo
Jouni
J
Laukkanen
Janne
J
Kuittinen
Markku
M
Kauranen
Martti
M
D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D020349:Surface Plasmon Resonance / Q000379:methods*; D014732:Vibration
D006046:Gold