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Applied Physics B

, Volume 84, Issue 1–2, pp 257–259 | Cite as

Efficient optical near-field energy transfer along an Au nanodot coupler with size-dependent resonance

  • W. NomuraEmail author
  • T. Yatsui
  • M. Ohtsu
Article

Abstract

We confirmed that the light intensity (λ=785 nm) scattered from an isolated hemispherical Au nanoparticle was resonantly enhanced at a diameter of 200 nm and a height of 50 nm, as observed experimentally using a collection-mode near-field optical microscope. The experimental results agreed with the calculated results using Mie’s theory. Furthermore, we observed resonant energy transfer of the optical near-field energy along a chain of Au nanoparticles. The magnitude of the transferred energy increased resonantly at the size of resonant light scattering for an isolated Au nanoparticle (200 nm diameter with 240 nm center-to-center separation).

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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  1. 1.School of EngineeringThe University of TokyoTokyoJapan
  2. 2.Solution-Oriented Research for Science and Technology (SORST)Japan Science and Technology AgencyTokyoJapan

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