STABLE OPTICAL STORAGE AND HIGH-ORDER DIFFRACTION IN A LIQUID-CRYSTALPOLYMER FILM BY 2-WAVE MIXING

Optical storage with long-term stability and up to third-order diffrac tion have been observed in a liquid-crystal polymer film by two-wave m ixing. After turning off the pump beam, the diffraction of the probe b eam remains. While the probe beam is turned off, the intensities of th e diffraction beams of the pump beam does not decrease significantly. A brilliant hologram spot is observed on the film during the experimen ts and the trace of the spot can be maintained over 120 days without o bvious change. (C) 1996 American Institute of Physics.