Now showing items 1-4 of 4

  • Analysis of the sign-dependent switching observed in a hybrid aligned nematic cell 

    Cornford, Stephen Leslie; Taphouse, T. S.; Sambles, J. Roy (Institute of Physics and Deutsche Physikalische Gesellschaft, 2009)
    An optical waveguide experiment was used to study the influence of dc electric fields on a hybrid aligned nematic liquid crystal cell. This dc switching differed from ac switching in two ways: first, the equilibrium states ...
  • Determination of the director profile in a nematic cell from guided wave data: an inverse problem 

    Cornford, Stephen Leslie; Taphouse, T. S.; Newton, C. J. P.; Sambles, J. Roy (Institute of Physics and Deutsche Physikalische Gesellschaft, 2007)
    We consider an inverse problem: the estimation of the nematic director profile from experimental fully leaky guided mode data. This inverse problem is ill-posed in that small changes in the data may lead to large changes ...
  • Rapid switching in a dual-frequency hybrid aligned nematic liquid crystal cell 

    Jewell, Sharon A.; Taphouse, T. S.; Sambles, J. Roy (American Institute of Physics, 2005)
    We report the optical characterization of a dual-frequency hybrid aligned nematic (HAN) liquid crystal cell driven between two states using a multiple-frequency sinusoidal pulse. The complex dynamic director structure ...
  • Time-resolved sign-dependent switching in a hybrid aligned nematic liquid crystal cell 

    Taphouse, T. S.; Cornford, Stephen Leslie; Birkett, J. E.; Sambles, J. Roy (Institute of Physics and Deutsche Physikalische Gesellschaft, 2008)
    An optical waveguide technique is used to determine the director tilt profile across a hybrid aligned nematic (HAN) liquid crystal cell, in which the optical response is dependent on the sign of the applied voltage. Two ...