Systematic studies of optically-trapped dielectric nanospheres

Mesoscopic resonators have garnered significant interest recently in a number of experiments designed to blur the line between classical and quantum systems. In particular, optically trapped mesoscopic particles offer a distinct advantage over many other systems, as they can be mechanically isolated from the environment. We present results from dynamical studies of micro- and nano-scale dielectric particles suspended in a free-space optical dipole trap. Particle position is monitored via the interference of scattered and unscattered laser light. Of interest are the effects of the trap laser and ambient pressure on the external motion and internal temperature of the particles.