An Extended Version of the Regular Solution Model for Stoichiometric Phases and Ionic Melts.

Abstract

Using a geometric optics approach, we first calculate the force exerted by a cylindrical light beam on a transparent hollow sphere. Afterwards, we present a theoretical study of this force depending on both sphere and beam parameters. According to these characteristics (radii and indexes of the sphere; width, mode and flux of the beam) a hollow sphere in a vertical beam will reach various equilibrium positions: in a TEM00 beam, the sphere will be centered on the beam axis but the stability requires conditions on indexes value; in a TEM∗01 beam, the sphere will be centered on the beam axis or off axis but the stability requires conditions on both indexes and beam parameters values.