Regensburg 2010 – scientific programme

Parts | Days | Selection | Search | Downloads | Help

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 7: Electronic and Optical Properties of Organic Systems II

CPP 7.9: Talk

Monday, March 22, 2010, 16:00–16:15, H39

PDMS-enclosed Liquid Crystal Lasers for Lab-On-Chip Applications — •Jürgen Schmidtke and Eugene M. Terentjev — Cavendish Laboratory, University of Cambridge, UK

During the past decade, self-assembled photonic band edge lasers based on cholesteric liquid crystals have attracted considerable interest as microscopic, coherent light sources. We demonstrate the operation of such a laser confined between optically clear and elastic polydimethylsiloxane (PDMS) rubber substrates. The formation of a planar helical texture in the cholesteric film was supported by microsctructuring of PDMS layer surface, using the nano-embossing technique with glass substrates coated with conventional alignment layers as a template. With PDMS being the standard material for the fabrication of microfluidic devices, this opens a simple and flexible route for the integration of microscopic laser sources for lab-on-chip applications like spectroscopy, photo-chemistry or fluorescence cytometry.