Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 64: Scanning Probe Techniques: Method development

O 64.11: Poster

Dienstag, 21. März 2017, 18:30–20:30, P2-OG3

Cantilever dynamics induced by light — •Sven Kraft, Heinrich Behle, Kai Wardelmann, Mohammedreza Bahrami, Dieter Schick, Semjon Köhnke, Boris Hage, Ingo Barke, and Sylvia Speller — University of Rostock, Institute of Physics, 18051 Rostock, Germany

Atomic Force Microscopy methods have been advanced to image a variety of properties on the nanoscale. In this work we discuss the interaction of light fields with the cantilever [1]. On the one hand a temporally controlled illumination of the cantilever leads to bending and oscillation due to radiation pressure and photothermal effects. The light-driven cantilever actuation can replace the dither piezo actuation. In liquids this leads to reduced dynamics in the medium and thereby to better defined resonances. On the other hand light itself, e.g. in form of spatially modulated light landscapes can give rise to additional forces which may serve as an observable to map nearfield interactions [2].

[1] D. Ramos, J. Tamayo, J. Mertens, and M. Calleja, J Appl Phys 99, 124904 (2006)

[2] D.C. Kohlgraf-Owens, S. Sukhov, and A. Dogariu, Phys Rev A 84, 011807(R) (2011)