Dresden 2014 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 54: Poster Session 3
CPP 54.12: Poster
Donnerstag, 3. April 2014, 15:00–19:00, P2
Spectroscopy of Dielectric Elastomer Actuators for the Application of Tunable Optical Elements — •Irma Slowik1, Markus Franke2, Markas Sudzius1, Rene Körbitz2, Hartmut Fröb1, Andreas Richter2, and Karl Leo1 — 1Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr Str. 1, 01069 Dresden — 2Institut für Halbleiter- und Mikrosystemtechnik, Technische Universität Dresden, Nöthnitzer Straße 64 01187 Dresden
Dielectric elastomers are promising materials for electromechanical systems because of their high dielectric strength and their ability to deform under applied voltage up to very high strains >300%. Dielectric elastomer actuators are used for artificial muscles, conformable displays, stretchable integrated circuits and biomedical electrode interfaces. Due to their high transparency and flexibility they show a high potential to build up tunable optical elements like tunable phase plates, cavities, or gratings.
We report on a dielectric elastomer film investigated by Fabry-Perot interferometry. The thin polymer film is sandwiched between two compliant ring electrodes. Under applied voltage, the electrostatic force squeezes the dielectric layer, which causes a deformation of the device. The thickness change in the actuator film can lead to a phase change up to several π. Additonally, dielectric elastomer actuator coated with a partly transparent mirror can act as a part of a tunable cavity. Due to the high resolution of the Fabry-Perot interferometer even small changes in the cavity length can be detected.