Physical Review Letters
confocal polarizing microscopy, films
We employ the fluorescent confocal polarizing microscopy to image edge dislocations in cholesteric liquid crystals. Surface anchoring at the bounding plates determines the structure and behavior of defects. Two types of plates set in-plane director orientation but differ in the type of associated anchoring potentials. Plates with strong polar anchoring and nonzero azimuthal anchoring repel the dislocations, while plates with weak polar anchoring and no azimuthal anchoring allow the dislocations to escape through the boundary. To explain the results, we propose a coarse-grained model of cholesteric anchoring.
Smalyukh, Ivan I. and Lavrentovich, Oleg (2003). Anchoring-Mediated Interaction of Edge Dislocations With Bounding Surfaces in Confined Cholesteric Liquid Crystals. Physical Review Letters 90(8). doi: 10.1103/PhysRevLett.90.085503 Retrieved from http://digitalcommons.kent.edu/cpippubs/209