Nonlinear optical properties of quantum sized gold clusters

Guda Ramakrishna, Oleg Varnavski, Junhyung Kim, Dongil Lee, Theodore Goodson

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

10 Citations (Scopus)


Gold clusters with the sizes close to the Fermi wavelength of electron shows interesting quantum size effects. Linear and nonlinear optical properties show dramatic trends when the sizes of clusters are in the range of quantum confinement. We have investigated the size dependence of the non-linear optical property of two-photon absorption (TPA) cross-sections of the gold clusters. Absolute TPA cross-sections are measured by a combination of one and two-photon excited fluorescence upconversion measurements. Large cross-sections and abrupt changes in the trend of cross-sections are observed in the size-dependence when size is reduced from nanoparticles to cluster. The results can be attributed to the appearance of quantum confinement in these monolayer protected gold clusters.

Original languageEnglish
Title of host publicationLinear and Nonlinear Optics of Organic Materials VIII
Publication statusPublished - 2008
EventLinear and Nonlinear Optics of Organic Materials VIII - San Diego, CA, United States
Duration: 2008 Aug 122008 Aug 14

Publication series

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


OtherLinear and Nonlinear Optics of Organic Materials VIII
Country/TerritoryUnited States
CitySan Diego, CA

All Science Journal Classification (ASJC) codes

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


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