Laser enhanced transports in strongly coupled dusty plasmas

The stress induced microscopic responses of dust particles in strongly coup led dusty plasma liquids suspended in plasma traps are investigated experim entally. Narrow laser beams are used to generate stress on dust particles t hrough optical pressure. Assisted by background thermal fluctuations, chaot ic micro-vortices with decaying intensities from the laser beam are generat ed. The forward transport and transverse diffusion rate are enhanced and sh ow nonlinear reponse to the external stress. Visco-elastic response is obse rved for an elongated liquid cluster driven by a periodically chopped laser beam. The shear wave is damped.