FORCES AND TORQUES EXERTED ON A MULTILAYERED SPHERICAL-PARTICLE BY A FOCUSED GAUSSIAN-BEAM

Radiation pressure is nowadays a common tool to manipulate particles. A large number of studies have been devoted to this technique, but mos t of them assume that the particle under study is a homogeneous partic le. Here we focus our attention on radiation pressure forces and torqu es exerted by a Gaussian beam on a multilayered sphere, with a particu lar attention devoted to the comparison between torque resonances and absorption resonances. (C) 1998 Elsevier Science B.V. All rights reser ved.