Plasmonic Nanolenses: Electrostatic Self-Assembly of Hierarchical Nanoparticle Trimers and Their Response to Optical and Electron Beam Stimuli.
Asymmetric nanoparticle trimers composed of particles with increasing diameter act as "plasmonic lenses" and have been predicted to exhibit ultrahigh confinement of electromagnetic energy in the space between the two smallest particles. Here we present an electrostatic self-assembly approach for creating gold nanoparticle trimers with an assembly yield of over 60%. We demonstrate that the trimer assembly leads to characteristic red-shifts and show the localization of the relevant plasmon modes by means of cathodoluminescence and electron energy loss spectroscopy. The results are analyzed in terms of surface plasmon hybridization.
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.|Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia.
Julian A
JA
Lloyd
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.|Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia.
Soon Hock
SH
Ng
Monash Centre for Electron Microscopy, Monash University , Clayton, Victoria 3800, Australia.|School of Physics, Monash University , Clayton, Victoria 3800, Australia.
Amelia C Y
AC
Liu
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.
Ye
0000-0002-5217-493X
Y
Zhu
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.
Wei
W
Chao
DELMIC BV , Thijsseweg 11, 2629 JA, Delft, The Netherlands.
Toon
T
Coenen
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.|Monash Centre for Electron Microscopy, Monash University , Clayton, Victoria 3800, Australia.
Joanne
J
Etheridge
Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia.|Commonwealth Scientific and Industrial Research Organisation , Manufacturing, Research Way, Clayton, Victoria 3168, Australia.|School of Applied Science, RMIT University , Melbourne, Victoria 3000, Australia.
Daniel E
DE
Gómez
Department of Materials Science and Engineering, Monash University , Clayton, Victoria 3800, Australia.|Melbourne Centre for Nanofabrication , Wellington Road 151, Clayton, Victoria 3168, Australia.|Commonwealth Scientific and Industrial Research Organisation , Manufacturing, Research Way, Clayton, Victoria 3168, Australia.
Udo
0000-0003-2922-4959
U
Bach
EELS; cathodoluminescence; gold nanoparticle assembly; nanolens; trimer