= Frank Jülicher
{c}
<Frank Jülicher> coauthored a calibration method for <optical tweezers> that combines the trapped particle's <thermal fluctuations> with its response to a controlled sinusoidal motion. These two measurements determine position and force scales without taking the particle's <drag coefficient> as an independently known input. The experiment tested the method both near and far from surfaces. Its physical advantage is to separate detector calibration from uncertain particle size, <viscosity> and wall-dependent drag.<Calibration of optical tweezers with positional detection in the back-focal-plane by Simon F. Tolić-Nørrelykke and others>[2006 paper, abstract: combined thermal/driven calibration and surface tests]{ref}
\Image[https://www.mpg.de/11652448/original-1603798340.jpg?t=ZXlKM2FXUjBhQ0k2TXpVd0xDSm9aV2xuYUhRaU9qUTFNQ3dpWm1sMElqb2lZM0p2Y0NJc0ltWnBiR1ZmWlhoMFpXNXphVzl1SWpvaWFuQm5JaXdpYjJKcVgybGtJam94TVRZMU1qUTBPSDA9LS0zNDcxNTA5ODQ0ZWEwNTNiZDFkMjc1MDNmYmU5ZGU2ZjUyN2VhMWY3]
{title=Portrait of <Frank Jülicher>}
{description=External portrait hosted by Max-Planck-Gesellschaft.}
{source=https://www.mpg.de/369578/physics-of-complex-systems-juelicher}
{width=260}
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