Berlin 2012 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 14: Poster: Glasses I (jointly with DY)
CPP 14.3: Poster
Dienstag, 27. März 2012, 18:15–20:15, Poster A
Holographic Studies of New Azobenzene-Containing Low-Molecular-Weight Phase-Change Materials — •Christoph Meichner1, Lothar Kador1, Christian Probst2, and Hans-Werner Schmidt2 — 1University of Bayreuth, Institute of Physics and Bayreuther Institut für Makromolekülforschung (BIMF), 95440 Bayreuth, Germany — 2University of Bayreuth, Macromolecular Chemistry I and Bayreuther Institut für Makromolekülforschung (BIMF), 95440 Bayreuth, Germany
Using a plane-wave holographic setup, we investigated new azobenzene-containing low-molecular-weight materials which reveal a light-induced phase change from glassy to liquid-crystalline. Different parameters such as refractive-index modulation, long-term stability, writing speed, and sensitivity have been measured for different mixing ratios between the photo-active material and a similar but inactive compound. The experiments demonstrated that the inactive compound showed partial reorientation effects, which were driven by the trans-cis-trans isomerization cycles of the azobenzene moieties. In addition, an improved setup for the parallel inscription and reconstruction of two-dimensional data pages was built to test the feasibility of fast and high-density data storage. It is based on an LCD spatial light modulator and high-quality camera objectives.