Method for levelling depressed surface of organic crystals

摘要

The invention discloses a method for imparting molecular-level smoothness to the surface of an organic crystal used as a non-linear optical material having a defective depression by levelling the surface depression so as to be free from a decrease in the incidence of a laser beam and energy transducing efficiency. The method comprises: bringing into contact a microprobe having a specified radius of curvature at the probe tip onto the crystal surface with a defective depression under a specified contacting load; scanning the surface with the probe to shave off the surface around the depression forming shavings; and transferring the shavings into the depression to fill the depression up to a flatness level flush with the level around the filled depression.