Relaxing constraints on data acquisition and position detection for trap stiffness calibration in optical tweezers
arXiv:2004.02795 · doi:10.1364/OE.394632
Abstract
Optical tweezers find applications in various fields, ranging from biology to physics. One of the fundamental steps necessary to perform quantitative measurements using trapped particles is the calibration of the tweezer's spring constant. This can be done through power spectral density analysis, from forward scattering detection of the particle's position. In this work, we propose and experimentally test simplifications to such measurement procedure, aimed at reducing post-processing of recorded data and dealing with acquisition devices that have frequency-dependent electronic noise. In the same line of simplifying the tweezer setup, we also present a knife-edge detection scheme that can substitute standard position-sensitive detectors.
References in corpus (8)
- Motional Quantum Ground State of a Levitated Nanoparticle from Room Temperature
- GW150914: First results from the search for binary black hole coalescence with Advanced LIGO
- Building one molecule from a reservoir of two atoms
- Direct observation of bimolecular reactions of ultracold KRb molecules
- Sensing of Static Forces with Free-Falling Nanoparticles
- Motional Sideband Asymmetry of a Nanoparticle Optically Levitated in Free Space
- Optical levitation of 10 nanogram spheres with nano- acceleration sensitivity
- High-resolution detection of Brownian motion for quantitative Optical Tweezers experiments