title: Coherent beam amplification with a photorefractive liquid crystal.
abstract: Coherent amplification of a signal beam by a strong pump beam is observed in thin films of fullerene-doped nematic liquid crystal. Exponential gain constants as high as 2890 cm(-1) with no phase cross talk are achieved at low applied dc bias voltage and pump beam intensity. The underlying mechanism is the electro-optically induced spatially reorientation of the liquid-crystal axis and the resultant phase-shifted index grating required for two-beam coupling.
authors.forename: I C
authors.initials: IC
authors.lastname: Khoo
authors.forename: B D
authors.initials: BD
authors.lastname: Guenther
authors.forename: M V
authors.initials: MV
authors.lastname: Wood
authors.forename: P
authors.initials: P
authors.lastname: Chen
authors.forename: M Y
authors.initials: MY
authors.lastname: Shih