Surface Plasmon-Mediated energy transfer in heterogap Au-Ag nanowires

Wei Wei, Li Shuzhou, Qin Lidong, Xue Can, Jill E. Millstone, Xu Xiaoyang, George C Schatz, Chad A. Mirkin

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

We report the observation of energy transfer from a gold (Au) nanodisk pair to a silver (Ag) nanowire across a 120 nm gap via surface plasmon resonance (SPR) excitation. The enhanced electromagnetic (EM) fields generated by Au SPR excitation induce oscillation of the conduction electrons in the Ag segment, transferring energy to it even though the Ag segment has only weak resonant interactions with the incident EM radiation. The induced Ag SPR produces strong EM fields at the position of the Ag segment, leading to a Raman signal ∼15 times greater than when the Ag segment is alone (not adjacent to the Au nanodisk pair). The Raman intensity is found to depend nonlinearly cm the incident laser intensity for laser power densities of 10 kW/cm 2, which is consistent with the results of EM theory calculations which are not able to account for the factor of 15 enhancement based on a linear mechanism. This suggests that energy transfer from the Au disk pair to the Ag segment involves an enhanced nonlinear polarization mechanism such as can be produced by the electronic Kerr effect or stimulated Raman scattering.

Original languageEnglish
Pages (from-to)3446-3449
Number of pages4
JournalNano Letters
Volume8
Issue number10
DOIs
Publication statusPublished - Oct 2008

Fingerprint

Surface plasmon resonance
Energy transfer
Nanowires
nanowires
energy transfer
Electromagnetic fields
surface plasmon resonance
Stimulated Raman scattering
Lasers
Silver
electromagnetic fields
Gold
Electromagnetic waves
Polarization
Kerr effects
Electrons
conduction electrons
excitation
lasers
radiant flux density

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Mechanical Engineering

Cite this

Wei, W., Shuzhou, L., Lidong, Q., Can, X., Millstone, J. E., Xiaoyang, X., ... Mirkin, C. A. (2008). Surface Plasmon-Mediated energy transfer in heterogap Au-Ag nanowires. Nano Letters, 8(10), 3446-3449. https://doi.org/10.1021/nl8023164

Surface Plasmon-Mediated energy transfer in heterogap Au-Ag nanowires. / Wei, Wei; Shuzhou, Li; Lidong, Qin; Can, Xue; Millstone, Jill E.; Xiaoyang, Xu; Schatz, George C; Mirkin, Chad A.

In: Nano Letters, Vol. 8, No. 10, 10.2008, p. 3446-3449.

Research output: Contribution to journalArticle

Wei, W, Shuzhou, L, Lidong, Q, Can, X, Millstone, JE, Xiaoyang, X, Schatz, GC & Mirkin, CA 2008, 'Surface Plasmon-Mediated energy transfer in heterogap Au-Ag nanowires', Nano Letters, vol. 8, no. 10, pp. 3446-3449. https://doi.org/10.1021/nl8023164
Wei W, Shuzhou L, Lidong Q, Can X, Millstone JE, Xiaoyang X et al. Surface Plasmon-Mediated energy transfer in heterogap Au-Ag nanowires. Nano Letters. 2008 Oct;8(10):3446-3449. https://doi.org/10.1021/nl8023164
Wei, Wei ; Shuzhou, Li ; Lidong, Qin ; Can, Xue ; Millstone, Jill E. ; Xiaoyang, Xu ; Schatz, George C ; Mirkin, Chad A. / Surface Plasmon-Mediated energy transfer in heterogap Au-Ag nanowires. In: Nano Letters. 2008 ; Vol. 8, No. 10. pp. 3446-3449.
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