Decay of Spatially Periodic Patterns in a Nematic Liquid Crystal
,Stanislaw A Rozanski
,Agnes B uka
Research Institute for Solid State Physics and Optics
University of Bayreuth
A detailed theoretical and experimental analysis of the decay of electroconvection patterns is presented in a planarly aligned nematic liquid crystal. The relaxation time is measured as a function of the wavenumber of the pattern using a light diffraction technique. A theoretical analysis exhibits a rich structure of the dispersion curves for the decay rates. An interesting relation between the realistic case of no-slip boundary conditions and the simpler free-slip case is found. The experimentally determined relaxation rates for both 'conductive' and 'dielectric' initial patterns follow the theoretical solution with subsequent jumps between branches when the wavenumber is increased.