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Photonic Force Microscopy (PFM) uses optically trapped particles to measure fluctuation based forces and potential landscapes. This feature makes it a very soft probing technique that is well suited to investigate surface interactions with biological samples. In addition, PFMs can be used in scan mode to create surface-profiles with a resolution better than the optical diffraction limit. In this talk we present an improved intermittent contact (tapping) mode PFM and a revised data analysis for more detailed surface height profiles.
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Matthias Allkemper, Alexander Rohrbach, "Improved tapping mode photonic force microscopy," Proc. SPIE 11798, Optical Trapping and Optical Micromanipulation XVIII, 117980H (1 August 2021); https://doi.org/10.1117/12.2597644