Berlin 2001 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 3: Light-induced Phenomena
CPP 3.1: Talk
Tuesday, April 3, 2001, 17:45–18:05, 110
Surface relief gratings in photoaddressable polymers, a new theory explains effects in cw- and pulsed experiments — •Oliver Baldus1 und Stephan Zilker2 — 1Lehrstuhl für Experimentalphysik II, 95440 Bayreuth — 2Philips Research Laboratories, Prof Holstlaan 4, 5656 AA Eindhoven, The Netherlands
Surface relief gratings (SRG) are a widely observed phenomenon in experiments with photoaddressable polymers and occur as well in experiments with pulse lasers as under cw-conditions. Though several attempts were made in order to explain SRGs, none of the proposed models e.g. the gradient force model or the mean field theory is able to explain all experimental data. Starting from results in pulsed experiments we developed a theory that explains surface modulations in cw-experiments and that is based on the inhomogeneous distribution of the refractive index in the sample. This theory is in position to explain the results gained under different writing geometries and under pulsed and cw-conditions.