Enhancement of the recording stability of a photorefractive polymer composite by the introduction of a trapping layer

Kim, Won-Sun; Lee, Jong-Woo; Park, Jung-Ki
October 2003
Applied Physics Letters;10/13/2003, Vol. 83 Issue 15, p3045
Academic Journal
A photorefractive polymer composite containing a trapping layer which exhibits a significant enhancement in its photorefractivity is reported. The photorefractive polymer composite containing a trapping layer showed a grating life time as high as 600 s, while the grating life time was only 7 s in the photorefractive polymer composite without a trapping layer. The grating growth rate was found to be unaffected by the introduction of a trapping layer. The diffraction efficiency and gain coefficient also increased by the introduction of a trapping layer. The enhancement in the photorefractive properties is due to the increase in the space-charge field developed in the photorefractive polymer composite containing a trapping layer. © 2003 American Institute of Physics.


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