Exploring the Dynamics of a Small Dielectric Sphere Due to the Higher-order Modes of an Optical Nanofiber

Emma Brinton


This thesis explores the dynamics of a small dielectric sphere due to the higher-order modes of an optical nanofiber. The electromagnetic field created from a laser traveling down the nanofiber induces a force on a glass bead. This force is dependent on the electromagnetic field and the effective dipole moment of the sphere. The force is found to have three components: the intensity term, the spin density term, and the momentum density term. Each term is calculated to determine the motion of the bead due to both individual forces and the laser as a whole.