Berlin 2005 – wissenschaftliches Programm

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DF: Dielektrische Festkörper

DF 4: Poster

DF 4.13: Poster

Samstag, 5. März 2005, 08:30–16:30, Poster TU C

Optical detection of ferroelectric domain orientation on the sub-wavelength scale — •Thomas Härtling and Lukas Eng — Institut für Angewandte Photophysik, Technische Universität Dresden, D-01062 Dresden

Ferroelectric crystals are promising materials for applications in new information storage devices. These memories record information encoded in the direction of the remanent polarization of the material. Commercially available devices so far read and write information by addressing storage positions electrically. As optical methods of data transportation and processing advance, the challenge arises to read and write information in such devices optically allowing for higher working speed.

Here, we present a method which facilitates "optical reading" of the polarization state in a ferroelectric material. The process makes use of optical properties of nobel metal clusters dispersed on the surface of a ferroelectric material and their dependence on the surrounding medium. The process is able to resolve domain dimensions below the diffraction limit.