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Monday, October 10, 2011

Size-Scaling in Optical Trapping of Silicon Nanowires

Alessia Irrera, Pietro Artoni, Rosalba Saija, Pietro G. Gucciardi, Maria Antonia Iatì, Ferdinando Borghese, Paolo Denti, Fabio Iacona, Francesco Priolo, and Onofrio M. Maragò

We investigate size-scaling in optical trapping of ultrathin silicon nanowires showing how length regulates their Brownian dynamics, optical forces, and torques. Force and torque constants are measured on nanowires of different lengths through correlation function analysis of their tracking signals. Results are compared with a full electromagnetic theory of optical trapping developed in the transition matrix framework, finding good agreement.

DOI

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