Photophysical and Redox NIR-Sensitivity Enhancement in Photorefractive Polymer Composites

Through the gate: The photophysical effect of “gating” (preillumination at a shorter wavelength) dramatically enhances the near‐infrared sensitivity of photorefractive polymer composites with generation‐limited recording dynamics. Gating with a short, intense pulse yields better results than when us...

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Bibliographic Details
Published in:Chemphyschem 2004-02, Vol.5 (2), p.277-284
Main Authors: Mecher, Erwin, Gallego-Gómez, Francisco, Meerholz, Klaus, Tillmann, Hartwig, Hörhold, Hans-Heinrich, Hummelen, Jan C.
Format: Article
Language:English
Subjects:
Applied sciences
doping
Electrical, magnetic and optical properties
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
gating
holography
Optical materials
Optics
Organic polymers
photorefractivity
Physicochemistry of polymers
Physics
polymers
Polymers and organics
Properties and characterization
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Summary:Through the gate: The photophysical effect of “gating” (preillumination at a shorter wavelength) dramatically enhances the near‐infrared sensitivity of photorefractive polymer composites with generation‐limited recording dynamics. Gating with a short, intense pulse yields better results than when using a longer pulse of reduced intensity. Redox doping (providing permanent charges) leads to an additional improvement of the sensitivity by a factor of two. See the picture for an illustration of the gating mechanism.
ISSN:1439-4235
1439-7641
DOI:10.1002/cphc.200300943