TY - JOUR
T1 - Plasmonic coupling in noble metal nanostructures
AU - Jain, Prashant K.
AU - El-Sayed, Mostafa A.
N1 - Funding Information:
We thank Wenyu Huang, Susie Eustis, Mahmoud A. Mahmoud, Svetlana Neretina, and Wei Qian and for their collaborative contributions to some of the work discussed here. P.J. would like to thank the Miller Institute for Basic Research in Science at UC Berkeley for funding. M.A.E. thanks the Materials Research Division of the National Science Foundation (No. 0527297) for funding.
Copyright:
Copyright 2010 Elsevier B.V., All rights reserved.
PY - 2010/3/5
Y1 - 2010/3/5
N2 - Noble metal nanostructures display unique and strongly enhanced optical properties due to the phenomenon of localized surface plasmon resonance (LSPR). In assemblies or complex noble metal nanostructures, individual plasmon oscillations on proximal particles can couple via their near-field interaction, resulting in coupled plasmon resonance modes, quite akin to excitonic coupling in molecular aggregates or orbital hybridization in molecules. In this frontier Letter we discuss how the coupling of plasmon modes in certain nanostructure geometries (such as nanoparticle dimers and nanoshells) allows systematic tuning of the optical resonance, and also the confinement and enhancement of the near-field, making possible improved refractive-index sensing and field-enhanced spectroscopy and photochemistry. We discuss the polarization, orientation, and distance-dependence of this near-field coupling especially the universal size-scaling of the plasmon coupling interaction. In addition to radiative properties, we also discuss the effect of inter-particle coupling on the non-radiative electron relaxation in noble metal nanostructures.
AB - Noble metal nanostructures display unique and strongly enhanced optical properties due to the phenomenon of localized surface plasmon resonance (LSPR). In assemblies or complex noble metal nanostructures, individual plasmon oscillations on proximal particles can couple via their near-field interaction, resulting in coupled plasmon resonance modes, quite akin to excitonic coupling in molecular aggregates or orbital hybridization in molecules. In this frontier Letter we discuss how the coupling of plasmon modes in certain nanostructure geometries (such as nanoparticle dimers and nanoshells) allows systematic tuning of the optical resonance, and also the confinement and enhancement of the near-field, making possible improved refractive-index sensing and field-enhanced spectroscopy and photochemistry. We discuss the polarization, orientation, and distance-dependence of this near-field coupling especially the universal size-scaling of the plasmon coupling interaction. In addition to radiative properties, we also discuss the effect of inter-particle coupling on the non-radiative electron relaxation in noble metal nanostructures.
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U2 - 10.1016/j.cplett.2010.01.062
DO - 10.1016/j.cplett.2010.01.062
M3 - Article
AN - SCOPUS:76449087906
SN - 0009-2614
VL - 487
SP - 153
EP - 164
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 4-6
ER -