  Ten $\mu$m -sized droplets in an aqueous-two-phase system (water/
polyethylene-glycol (PEG)/ dextran) dissapear upon irradiation with a focused
YAG laser. The interface of the dextran-rich droplet broadens, indicating
smoothing of the concentration profile, whereas, the PEG-rich droplet shrinks
and disappears. These phenomena can be described in terms of the
Ginzburg-Landau free energy, by considering the laser-induced dielectric
potential.
