Parallel, linear, and subnanometric 3D tracking of microparticles with Stereo Darkfield Interferometry

{'id': 'rieu2021', 'abstract': 'While crucial for force spectroscopists and microbiologists, three-dimensional (3D) particle tracking suffers from either poor precision, complex calibration, or the need of expensive hardware, preventing its massive adoption. We introduce a new technique, based on a simple piece of cardboard inserted in the objective focal plane, that enables simple 3D tracking of…