title: Calibration of nonspherical particles in optical tweezers using only position measurement.
abstract: Nonspherical probe particles are an attractive choice for optically-trapped scanning probe microscopy. We show that it is possible to calibrate a trap with a nonspherical particle using only position measurements, without requiring measurement of orientation, using a pseudopotential based on the position occupation probability. It is not necessary to assume the force is linear with displacement.
authors.affiliation: School of Mathematics and Physics, The University of Queensland, St. Lucia, Queensland 4072, Australia.
authors.forename: Ann A M
authors.initials: AA
authors.lastname: Bui
authors.forename: Alexander B
authors.initials: AB
authors.lastname: Stilgoe
authors.forename: Timo A
authors.initials: TA
authors.lastname: Nieminen
authors.forename: Halina
authors.initials: H
authors.lastname: Rubinsztein-Dunlop
mesh_terms: D002138:Calibration; D008962:Models, Theoretical; D052898:Optical Tweezers