Near-field two-photon-induced photoluminescence from single gold nanorods and imaging of plasmon modes

Kohei Imura, Tetsuhiko Nagahara, Hiromi Okamoto

研究成果: Article査読

293 被引用数 (Scopus)

抄録

We investigated the two-photon-induced photoluminescence properties of single gold nanorods by scanning near-field spectroscopy. The process was found to be initiated by a sequential one-photon absorption for creating a pair of an electron and a hole in the sp and d bands. Photoluminescence is then radiated when the electron near the Fermi surface recombines with the hole near the X and L symmetry points. The polarization characteristics of emitted photons from the X and L regions were found to be different. These characteristics can be understood by the crystalline structure and the band structure of the gold nanorod. We found characteristic spatial oscillatory features along the long axis of the nanorods in photoluminescence excitation images. The images were well reproduced by density-of-states maps of the nanorods calculated with Green's dyadic method and were attributed to the spatial characteristics of the wave functions of the plasmon modes inside the nanorods.

本文言語English
ページ(範囲)13214-13220
ページ数7
ジャーナルJournal of Physical Chemistry B
109
27
DOI
出版ステータスPublished - 2005 7 14
外部発表はい

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

フィンガープリント 「Near-field two-photon-induced photoluminescence from single gold nanorods and imaging of plasmon modes」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル