Chow, T. H.; Lee, W. M.; Tan, K. M.; Ng, B. K.; Sheppard, C. J. R.
In this paper, we demonstrate the use of coherence gating to resolve particle positions and forces
in the axial direction. Through coherence gating, particle displacements and interparticle separations
can be resolved with a high signal-to-noise ratio. We achieved both high depth resolvability
10−6m and weak optical force 10−15 N measurements in an optical trapping system using a low
coherence interferometry system. Trap stiffness as low as 1.46 fN m−1 was measured. This
technique is...[Show more]
Items in Open Research are protected by copyright, with all rights reserved, unless otherwise indicated.