Using optical second-harmonic generation, we measure the anisotropic orientation behavior of liquid-crystal siloxane molecules embedded in a ferroelectric liquid-crystal matrix. An exceedingly high degree of in-plane anisotropy is observed, which could be unambiguously attributed to effective second-order susceptibility components (2)χyxx,(2)χyyy, and (2)χyxy. All coordinates refer to a rectangular surface-stabilized ferroelectric liquid-crystal sample cell with z the surface normal and y the direction of the unidirectionally rubbed interior polyimide layer. The second-harmonic efficiency that is due to the dominant electric-field-induced component (2)χyyy this binary guest-host system exceeds the efficiency of other liquid-crystal systems reported so far by more than one order of magnitude.
© 1992 Optical Society of America
G. Marowsky, E. Heinemann, M. Pinnow, F. Sieverdes, F. H. Kreuzer, H. Leigeber, and A. Miller, "Ferroelectric liquid-crystal-controlled anisotropic second-harmonic generation," Opt. Lett. 17, 1328-1330 (1992)