Ultrafast near-field microscopy of single gold nanoparticles

K. Imura, H. Okamoto

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We investigated near-field optical properties and images of single gold nanorods by using a near-field optical microscope. Observed transmission spectra show distinct transverse and longitudinal surface plasmon resonances. Transmission images observed near the surface plasmon resonances agree qualitatively with calculated maps of optical local density-of-states, and are assignable to plasmon wavefunctions. Ultrafast temporal responses in the single gold nanoparticles were observed by combining a near-field microscope with time-resolved techniques. Observed transient transmission images of the single nanorods show characteristic optical features, and are in good agreement with a calculated map of variation of local density of states arising from the elevation of electronic temperature in the nanorod induced by photoexcitation.

Original languageEnglish
Title of host publicationUltrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV
DOIs
Publication statusPublished - 2007 May 24
Externally publishedYes
EventUltrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV - San Jose, CA, United States
Duration: 2007 Jan 222007 Jan 24

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6471
ISSN (Print)0277-786X

Conference

ConferenceUltrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV
CountryUnited States
CitySan Jose, CA
Period07/1/2207/1/24

Keywords

  • Gold nanorod
  • Local density of states
  • Near-field optical microscope
  • Surface plasmon
  • Ultrafast phenomena

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Imura, K., & Okamoto, H. (2007). Ultrafast near-field microscopy of single gold nanoparticles. In Ultrafast Phenomena in Semiconductors and Nanostructure Materials XI and Semiconductor Photodetectors IV [647103] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6471). https://doi.org/10.1117/12.696994