Abstract

Nematic films doped with molecules of high nonlinear polarizability can exhibit two-dimensional asymmetry after electric-field poling along one direction only. Consequently, these films exhibit more nonzero components of the second-order susceptibility tensor than are obtained through usual poling techniques. These films can exhibit very high nonlinear optical coefficients (close to 10−7 esu/cm3) and retain most of their nonlinearity one week after removal of the poling field.

© 1990 Optical Society of America

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