Regensburg 2007 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 2: Internal Symposium “Nonlinearities of Photonic Materials”
DF 2.2: Vortrag
Montag, 26. März 2007, 10:40–11:00, H11
Holographic polymer-dispersed liquid crystals for neutron optics — •Martin Fally1, Irena Drevenšek-Olenik2, Mostafa Ellabban1, Klaus Pranzas3, and Jürgen Vollbrandt3 — 1Fakultät für Physik, Universität Wien, Boltzmanngasse 5, A-1090 Wien, Österreich — 2Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19 und and J. Stefan Institute, Jamova 39, SI 1001 Ljubljana, Slovenia — 3GKSS Forschungszentrum, D-21502 Geesthacht, Germany
Holographic polymer-dispersed liquid crystals (H-PDLC) are electrically switchable photonic media with large potential for optical applications.
Here, we demonstrate that H-PDLC are not only interesting for nonlinear light optics but also for neutron optics. We report strong diffraction of cold neutrons from an only 30 micrometer thick holographic polymer-dispersed liquid crystal transmission grating [1]. The nonlinearty mechanism of this photonic material and the diffraction are discussed and compared to light optical experiments performed on the same sample[2]. We finally argue, why H-PDLCs are promising candidates for fabricating not only photonic crystals but also electrically switchable neutron-optical devices.
[1] M. Fally, I. Drevenšek-Olenik, M. A. Ellabban, K. P. Pranzas, and J. Vollbrandt, Phys. Rev. Lett. 97, 167803 (2006)
[2] I. Drevenšek-Olenik, M. Fally, and M. Ellabban, Phys. Rev. E 74, 021707 (2006)