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CPP: Chemische Physik und Polymerphysik
CPP 25: POSTER Electronic Structure and Spectroscopy
CPP 25.21: Poster
Donnerstag, 30. März 2006, 17:00–19:00, P2
Investigation of gratings formed in the interface pDR1m / PMMA — •Knut Morawetz1, Ulrich Pietsch2, Burkhard Schulz1, Pertsh Mirzoyan1, Marina Saphiannikova1, Oliver Henneberg1, and Birgit Dietzel3 — 1University of Potsdam, Institute of Physics, Am Neuen Palais 10, D-14469, Germany — 2University of Siegen, Solid state physics, 57068 Siegen , Germany — 3IDM-Teltow, Kantstraße 55, D-14513 Teltow, Germany
Surface relief gratings (SRGs) can be inscribed onto azobenzene polymer films by holographic illumination with the actinic light (488 nm). By exposing the initially flat surface of a polymer film to an interference pattern of two counter-circularly polarized beams one can create a SRG with amplitudes of several nanometer height within a few minutes of exposure. The lateral spacing D can be tuned between D= 500 and 5000 nm by changing the angle between the two parts of split up laser beam. To get a multiplayer system it was covered a pDR1m film by a second transparent polymer layer (PMMA) that is not affected by the actinic light. After holographic illumination of these layer system it was found a diffraction pattern of light. The PMMA layer was removed by washing the sample with a solvent. The free surface of the azobenzene polymer layer was inspected by AFM. In the washed region the grating height was found to be inverse proportional to the PMMA height. Theoretical simulations conform the experimental results.