Toe, Wen JunOrtega-Piwonka, IgnacioAngstmann, Christopher N.Gao, Qiangta, Hark HoeJagadish, ChennupatiHenry, Bruce I.re, Peter J.2024-01-082024-01-082016-02-24W. J. Toe, I. Ortega Piwonka, C. N. Angstmann, Q. Gao, H. H. Tan, C. Jagadish, B. I. Henry, P. J. Reece. Nonconservative dynamics of optically trapped high-aspect-ratio nanowires. Physical Review E 93(2), 022137 (2016)2470-00532470-0045https://hdl.handle.net/10115/28262The Australian National Fabrication Facility (ANFF) and Australian Research Council (ARC) are acknowledged for supporting the nanowire growth facilities utilized in this work.We 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.engTweezersinfo:eu-repo/semantics/article10.1103/PhysRevE.93.022137info:eu-repo/semantics/openAccess