Berlin 2015 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 2: Focus: Field Controllable Functional Polymers I
CPP 2.7: Vortrag
Montag, 16. März 2015, 11:45–12:00, C 264
Electro-optics in fast switching polymer-stabilized liquid crystals of high chirality — •Alexander Lorenz1, Damian J. Gardiner2, Rachel Hyman2, Stephen M. Morris3, and Timothy D. Wilkinson2 — 1Stranski-Laboratorium, Sek. TC 9, Technische Universität Berlin, Str. des 17. Juni 124, 10623 Berlin, Germany — 2Centre of Molecular Materials for Photonics and Electronics, Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom — 3Department of Engineering Science University of Oxford, Parks Road, Oxford OX1 3PJ, United Kingdom
The electro-optic performance of a fast (< 1 ms) switching polymer-stabilized hyper-twisted chiral nematic LC [1] was rigorously analyzed with experiments and simulations: The induced birefringence was quantitatively traced back to both flexoelectro-optic switching and dielectric coupling [1]. In addition, a polymer-stabilized wide temperature blue phase LC [2] (based on well-known LC E7 and chiral dopant R5011) was generated in reflective test cells that possessed structured aluminum electrodes on a silicon wafer. A diffraction experiment revealed continuous, polarization independent optical phase modulation (maximum phase modulation depth of pi) in the thin (4 microns) polymer-stabilized LC layer [2]. 1. A. Lorenz et al., Applied Physics Letters 104, 071102 (2014). 2. R. M. Hyman et al., Applied Optics 53, 6925 (2014).