Optically trapped beads with diameters below 500 nm are scanned across surface structures. The elongation of the probe from the trap center is measured interferometrically and the height profile of the sample is recovered.
© 2011 OSA
L. Friedrich and A. Rohrbach, "Surface Scanning with Optically Trapped Probes," in Optics in the Life Sciences, OSA Technical Digest (CD) (Optical Society of America, 2011), paper OTMC3.
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