Characterization of multiphoton emission from aggregated gold nano particles

Akira Eguchi, Phat Lu, Youngsik Kim, Tom D. Milster

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

1 Scopus citations

Abstract

Although gold nanoparticles (GNPs) are promising probes for biological imaging because of their attracting optical properties and bio-friendly nature, properties of the multi-photon (MP) emission from GNP aggregates produced by a short-wave infrared (SWIR) laser have not been examined. In this paper, characterization of MP emission from aggregated 50 nm GNPs excited by a femtosecond (fs) laser at 1560 nm is discussed with respect to aggregate structures. The key technique in this work is single particle spectroscopy. A pattern matching technique is applied to correlate MP emission and SEM images, which includes an optimization processes to maximize cross correlation coefficients between a binary microscope image and a binary SEM image with respect to xy displacement, image rotation angle, and image magnification. Once optimization is completed, emission spots are matched to the SEM image, which clarifies GNP ordering and emission properties of each aggregate. Correlation results showed that GNP aggregates have stronger MP emission than single GNPs. By combining the pattern matching technique with spectroscopy, MP emission spectrum is characterized for each GNP aggregate. A broad spectrum in the visible region and near infrared (NIR) region is obtained from GNP dimers, unlike previously reported surface plasmon enhanced emission spectrum.

Original languageEnglish (US)
Title of host publicationPlasmonics
Subtitle of host publicationDesign, Materials, Fabrication, Characterization, and Applications XIV
EditorsSatoshi Kawata, Din Ping Tsai
PublisherSPIE
ISBN (Electronic)9781510602335
DOIs
StatePublished - Jan 1 2016
Event2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV - San Diego, United States
Duration: Aug 28 2016Sep 1 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9921
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Other

Other2016 SPIE Optics + Photonics Conference on Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV
CountryUnited States
CitySan Diego
Period8/28/169/1/16

Keywords

  • Aggregation
  • Gold nano particle
  • Multi-photon
  • Pattern matching
  • Solid immersion lens

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

    Eguchi, A., Lu, P., Kim, Y., & Milster, T. D. (2016). Characterization of multiphoton emission from aggregated gold nano particles. In S. Kawata, & D. P. Tsai (Eds.), Plasmonics: Design, Materials, Fabrication, Characterization, and Applications XIV [99210X] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 9921). SPIE. https://doi.org/10.1117/12.2235937