Toe, Wen JunOrtega-Piwonka, IgnacioAngstmann, Christopher N.Gao, QianTan, Hark HoeJagadish, ChennupatiHenry, B IReece, Peter2018-11-292018-11-291063-651Xhttp://hdl.handle.net/1885/152854We investigate the dynamics of high-aspect-ratio nanowires trapped axially in a single gradient force optical tweezers. A power spectrum analysis of the dynamics reveals a broad spectral resonance of the order of kHz with peak properties that are strongly dependent on the input trapping power. A dynamical model incorporating linear restoring optical forces, a nonconservative asymmetric coupling between translational and rotational degrees of freedom, viscous drag, and white noise provides an excellent fit to experimental observations. A persistent low-frequency cyclical motion around the equilibrium trapping position, with a frequency distinct from the spectral resonance, is observed from the time series data.application/pdf201610.1103/PhysRevE.93.0221372018-11-29