Berlin 2008 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 27: Photonic crystals III

HL 27.7: Talk

Tuesday, February 26, 2008, 17:45–18:00, EW 203

Lasing and selected physical Properties of Photonic Composites obtained by doping of Liquid Crytsals with Nanomaterials — •Wolfgang Haase and Fedor Podgornov — Eduard-Zintl-Institute for Inorganic and Physical Chemistry, Darmstadt University of Technology, Petersenst. 20, D 64287 Darmstadt

We will report on some physical properties obtained by doping of Liquid Crystals (LC)/Ferroelectric Liquid Crystals (FLC) with different Nanomaterials as are Single Walled Carbon Nanotubes (SWCNT), Titaniumdioxide, Bariumtitanate. Tunable Lasing on cholesteric-nematic Nanocomposites could be obtained. Several electrooptical properties as are switching time, spontaneous polarization will be reported. The dielectric spectra of FLC/SWCNT show remarkable reduction of the absorption intensity, this has been interpreted as due to trapping of ions/charges on the interface FLC/SWCNT.