title: Robust control approach to force estimation in a constant position optical tweezers.
abstract: Feedback enhanced optical tweezers with position regulation capability enable detection and estimation of forces in the pico-Newton regime. In this article we delineate the fundamental limitations and challenges of existing approaches for regulating position and force estimation in an optical tweezer. A modern control systems approach is shown to improve the bandwidth of force estimation by three to four times which is corroborated experimentally.
authors: University of Minnesota, 200 Union St SE, Minneapolis, Minnesota 55455, USA. aggar028@umn.edu
authors: Tanuj
authors: T
authors: Aggarwal
authors: Hullas
authors: H
authors: Sehgal
authors: Murti
authors: M
authors: Salapaka
mesh_terms: D005246:Feedback; D016014:Linear Models; D008962:Models, Theoretical; D052898:Optical Tweezers