Photosensitive polymeric media for two-photon based optical data storage

Kevin D. Belfield, Katherine J. Schafer, Stephen Andrasik

Research output: Contribution to journalConference articlepeer-review

1 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-photon 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)275-283
Number of pages9
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2002
Externally publishedYes
EventMultiphoton Absorption and Nonlinear Transmission Processes: Materials, Theory, and Applications - Seattle, WA, United States
Duration: Jul 8 2002Jul 9 2002

All Science Journal Classification (ASJC) codes

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


  • Fluorophore
  • Optical data storage
  • Photoacid generation
  • Two-photon absorption
  • Two-photon fluorescence imaging


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