Holographic recording in a system with annihilating centers: relaxation and suppression of transmission fluctuations of transient gratings

摘要

Abstract: The holographic record of gratings on excited triplet(T) annihilating centers in rigid mediums is proposed.The annihilation stage of the reaction T $PLU T $YLD 0is visualized by measuring of the diffraction picturedynamics. It has been found theoretically that thesecond range diffraction maximum is appear inconsequence of the nonsinusoidal grating form. Theanalytical expressions for the intensity of first andsecond range diffraction maximum are obtained. Thefluctuations of the transient grating transmission,$tau$-A$/, in a porous medium are investigated. Thedrastic decrease in the disperse $delta$tau$-A$/ isobserved for the system with annihilating excitedtriplet centers. Two species of the reaction mechanismare studied: static and diffusion - acceleratedannihilation. In the second case the reduction of$delta$tau$-A$/ was greater. The squeezed fluctuationseffect induced by additional laser pulse isdiscussed.!12