Design and optimization of a reflection-based fiber-optic tweezers.
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.
Bragheri
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F
CNISM and Electronic Department, University of Pavia, Pavia, Italy. francesca.bragheri@unipv.it
Minzioni
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Liberale
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Di Fabrizio
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Cristiani
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