Abstract
Electrooptical properties of a polymer/LC grating, which is fabricated by UV irradiation using a mixture of liquid crystal and prepolymer, have been investigated. The diffraction light can be easily controlled by an applied voltage. The response times depend strongly on the applied voltage. On the other hand, recovery times depend slightly on the applied voltage. The response and recovery times around tens of millisecond have been achieved for a lower driving voltage (10V). Experimental results also show that the high diffraction efficiency of 30% for the 1st-order and good extinction ratio over 60:1 are obtained. The groove depth which influences the diffraction efficiency, has also been measured and discussed in various fabrication conditions.
