Abstract
We present theoretical calculations of linear and nonlinear optical trapping using the dipole approximation. We investigate the effect of nonlinearities on dielectric and plasmonic particles under both continuous and pulse excitations. Theoretical calculations show that Kerr nonlinearities under pulse illumination increase the transverse and longitudinal stabilities of the dielectric nanoparticles, moreover, the nonlinearities decrease the transverse stability and increase the longitudinal stability of plasmonic nanoparticles. These calculations help us to better understand the dynamic of levitated optomechanical systems.
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