Regensburg 2002 – wissenschaftliches Programm
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CPP: Chemische Physik und Polymerphysik
CPP 10: Funktionalisierte Polymere
CPP 10.2: Vortrag
Dienstag, 12. März 2002, 16:30–16:50, H38
Temperature Dependencies in Organic Photorefractive Materials — •André Leopold1, Ralf Bausinger1, Dietrich Haarer1, Jolita Ostrauskaite2, and Mukundan Thelakkat2 — 1Experimentalphysik IV and BIMF, University of Bayreuth, Bayreuth, Germany — 2Makromolekulare Chemie I and BIMF, University of Bayreuth, Bayreuth, Germany
The response in photorefractive materials is based on the buildup of a space charge field, which is controlled by charge transport properties of the materials involved.
This space charge field induces the reorientation of the chromophores, whose birefringence is a major contribution to the photorefractive response.[1] Therefore, the performance of organic photorefractive materials strongly depends on the sample temperature with respect to its glass transition temperature Tg. The latter can be controlled by additives or by changing the structure of the involved polymer.
In this presentation, special attention will be given to the question as to how the above mentioned processes influence the observed photorefractive response.
[1] W. E. Moerner et al., J. Opt. Soc. Am. B, 1994, 11, 320