Photosensitive polymeric media for two-photon-based optical data storage

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

doi:10.1117/12.453324

14 February 2003 Photosensitive polymeric media for two-photon-based optical data storage

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

Proceedings Volume 4797, Multiphoton Absorption and Nonlinear Transmission Processes: Materials, Theory, and Applications; (2003) https://doi.org/10.1117/12.453324
Event: International Symposium on Optical Science and Technology, 2002, Seattle, WA, United States

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-JR (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 ofthe 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.

Citation Download Citation

Kevin D. Belfield, Katherine J. Schafer, and Stephen Andrasik "Photosensitive polymeric media for two-photon-based optical data storage", Proc. SPIE 4797, Multiphoton Absorption and Nonlinear Transmission Processes: Materials, Theory, and Applications, (14 February 2003); https://doi.org/10.1117/12.453324

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