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Proceedings Paper

Three-dimensional two-photon imaging in polymeric materials
Author(s): Kevin D. Belfield; Katherine J. Schafer; Stephen Andrasik; Ozlem Yavuz; Eric W. Van Stryland; David J. Hagan; Joel M. Hales
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Paper Abstract

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.

Paper Details

Date Published: 23 January 2002
PDF: 9 pages
Proc. SPIE 4459, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage, (23 January 2002); doi: 10.1117/12.454033
Show Author Affiliations
Kevin D. Belfield, CREOL/Univ. of Central Florida (United States)
Katherine J. Schafer, CREOL/Univ. of Central Florida (United States)
Stephen Andrasik, Univ. of Central Florida (United States)
Ozlem Yavuz, Univ. of Central Florida (United States)
Eric W. Van Stryland, CREOL/Univ. of Central Florida (United States)
David J. Hagan, CREOL/Univ. of Central Florida (United States)
Joel M. Hales, CREOL/Univ. of Central Florida (United States)


Published in SPIE Proceedings Vol. 4459:
Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications VII, and Optical Data Storage
Shizhuo Yin; Francis T. S. Yu; Hans J. Coufal; Hans J. Coufal, Editor(s)

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