Bragheri F, Minzioni P, Liberale C, Di Fabrizio E, Cristiani I
CNISM and Electronic Department, University of Pavia, Pavia, Italy.
Opt Express. 2008 Oct 27;16(22):17647-53. doi: 10.1364/oe.16.017647.
We present the numerical modelling of a novel all-fiber optical tweezers, whose efficacy has been recently demonstrated. The device, realized by properly shaping the end-face of a fiber bundle, exploits total internal reflection to enhance the trapping efficiency. In order to allow the optimization of the performance, the trapping efficiency is evaluated as a function of different geometrical parameters of the structure. Given the peculiar spatial and angular distribution of the optical field, a new figure of merit is adopted to assess tweezers performance.
