Berlin 2005 – scientific programme

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HL: Halbleiterphysik

HL 58: Poster IIb

HL 58.27: Poster

Tuesday, March 8, 2005, 16:30–19:00, Poster TU F

Photoprocessable polymer opals — •Birger Lange and Rudolf Zentel — Institute of Organic Chemistry, Department of Chemistry and Pharmacy, University of Mainz, Duesbergweg 10-14, D-55099 Mainz

Progress in electronics and photonics can be seen in the development of new materials, which broadens our ability to manipulate electron and photon transport respectively. Photonic crystals are a new class of materials first discussed in 1987. Eli Yablonovitch and Sajeev John introduced the idea of controlling light and its emission with photonic crystalline materials. For a good control of light we need first a photonic crystal, this is here accomplished by the synthesis of monodisperse colloids from the acid labile polymer poly-tert.-butyl-methacrylate and a subsequent crystallization into polymer opals. Second we need the possibility to structure the photonic crystals, this could be achieved by loading the colloids with photoacid generator before crystallization. Irradiation with UV-light followed by baking and development with aqueous base allows subsequent patterning of the opaline films. This chemical approach makes it possible to use the self-assembly of this colloids (opal formation) to form a large scale periodic structure, and introduce optical defects with UV-lithography.