Three-dimensional two-photon imaging in polymeric materials

Kevin D. Belfield, Katherine J. Schafer, Stephen Andrasik, Ozlem Yavuz, Eric W. Van Stryland, David J. Hagan, Joel M. Hales

Research output: Contribution to journalConference articlepeer-review

4 Scopus citations


We report image formation via single and two-photon photoinduced fluorescence changes in a polymeric medium with two-photon fluorescence readout of multiplayer structures. Photoinduced acid generation in the presence of a two-photon fluorescent dye possessing strongly basic functional groups (7-benzothiazolyl-9,9-didecyl-2,2-(N,N-diphenylamino)fluorene underwent protonation upon exposure with UV or near-IR (740 nm fs pulses). Solution studies demonstrate formation of monoprotonated and diprotonated species upon irradiation, each resulting in distinctly different absorption and fluorescence properties. The fluorescence of the original, neutral, fluorophore is quenched upon monoprotonation with a concomitant increase in fluorescence at longer wavelengths due to the monoprotonated form. Hence, two channel two-platon fluorescence imaging provides "positive" or "negative" image readout capability. Results of solution and solid polymer thin films experiments are presented.

Original languageEnglish (US)
Pages (from-to)281-289
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2001
Externally publishedYes
EventPhotorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applicationsn VII, and Optical Data Storage - San Diego, CA, United States
Duration: Jul 29 2001Jul 31 2001

All Science Journal Classification (ASJC) codes

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


  • Fluorophore
  • Photoacid generation
  • Two-photon fluorescence imaging


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