Rotational dynamics of optically trapped polymeric nanofibers

Details Rotational dynamics of optically trapped polymeric nanofibers Rotational dynamics of optically trapped polymeric nanofibers

2009-07-13

arxiv.org/abs/0907.2111v1

Physics

Optics

(21 pages, 5 figures)

Scientific paper

The optical trapping of polymeric nanofibers and the characterization of the rotational dynamics are reported. A strategy to apply a torque to a polymer nanofiber, by tilting the trapped fibers using a symmetrical linear polarized Gaussian beam is demonstrated. Rotation frequencies up to 10 Hz are measured, depending on the trapping power, the fiber length and the tilt angle. A comparison of the experimental rotation frequencies in the different trapping configurations with calculations based on optical trapping and rotation of linear nanostructures through a T-Matrix formalism, accurately reproduce the measured data, providing a comprehensive description of the trapping and rotation dynamics.

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