Absorbance and Pitch Relationships in Dichroic Guest-Host Liquid Crystal Systems
The absorbance of a dichroic dye dissolved in chiral nematic hosts in the Grandjean texture increased with decreasing pitch of the host. Absorbance was higher for hosts of low birefringence and high order parameter. Boundary condition, homeotropic or parallel (homogeneous), had no appreciable effect on absorbance, but threshold voltage was higher for the parallel than homeotropic boundary. The results agreed with theoretical plots relating absorbance to pitch.
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