Modulation of optical properties of new photosensitive polymers: 3-D optical data storage media

    Authors

    K. D. Belfield; K. I. Schafer;S. Andrasik

    Comments

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    Keywords

    ABSORBING FLUORENE DERIVATIVES; MEMORY; DYES; Chemistry, Multidisciplinary; Materials Science, Multidisciplinary; Optics; Polymer Science

    Abstract

    We report the modulation of absorption and emission properties via single and two-photon photoinduced changes in polymeric media with two-photon fluorescence readout of multilayer structures. Photoinduced acid generation in the presence of a two-photon fluorescent dye possessing strongly basic functional groups underwent protonation upon exposure with UV or near-IR (740 nm fs pulses) irradiation. Solution studies demonstrate formation of monoprotonated and diprotonated species upon irradiation, each resulting in distinctly different absorption and fluorescence properties, Hence, two-channel, two-photon fluorescence imaging provides "positive" or "negative" image readout capability. Further, a poly-styrene-co-malaic anhydride copolymer containing a two-photon absorbing fluorophore was used to demonstrate near-IR two-photon based image formation, followed by two-photon based image readout. Results of solution and solid polymer thin films experiments are presented.

    Journal Title

    Chromogenic Phenomena in Polymers: Tunable Optical Properties

    Volume

    888

    Publication Date

    1-1-2005

    Document Type

    Article

    Language

    English

    First Page

    122

    Last Page

    134

    WOS Identifier

    WOS:000225634600009

    ISSN

    0097-6156; 0-8412-3830-8

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