Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 18: Poster Session
MM 18.12: Poster
Montag, 31. März 2014, 18:00–20:00, P4
Light-driven rotation of chiral, screw-like microstructures in a fluidic environment — •Lindsey JE Anderson1, Silke Kirchner1, Debora Schamel2, Peer Fischer2, Theobald Lomüller1, and Jochen Feldmann1 — 1Photonics and Optoelectronics Group, Department of Physics and CeNS, Ludwig-Maximilians-Universtität München, Amalienstr. 54 80799 Munich, Germany — 2Max Planck Institute for Intelligent Systems, Heisenbergstr. 3 70569 Stuttgart, Germany
Propulsion of nano and micron-scale objects controlled by a remote stimulus is of great interest for creating machines and sensors in microfluidic environments. We study the influence of light on chiral, screw-like silica particles which are fabricated with glancing angle deposition. In an optical trap, these structures orient along the optical axis and radiation pressure causes them to rotate with a frequency that is proportional to the laser power. The rotation of these structures makes them candidates for artificial propellers, with a geometry that allows for the possibility of easily permeating biological membranes. Because of the highly controllable fabrication process, it is possible to design hybrid metallic propellers with this chiral structure and study how plasmonic interactions influence their functionality.