Absorbance and Pitch Relationships in Dichroic Guest-Host Liquid Crystal Systems

  • H. S. ColeJr.
  • S. Aftergut


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.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    G.H. Heilmeier and L.A. Zanoni, Appl. Phys. Lett. 13, 91 (1968); G.H. Heilmeier, J.A. Castellano and L.A. Zanoni, Mol. Cryst. Liq. Cryst. 8, 293 (1969).Google Scholar
  2. 2.
    D.L. White and G.N. Taylor, J. Appl. Phys. 45, 4718 (1974).CrossRefGoogle Scholar
  3. 3.
    A. Saupe (private communication, to be published).Google Scholar
  4. 4.
    P. Kassubek and G. Meier, Mol. Cryst. Liq. Cryst. 8, 305 (1969).Google Scholar
  5. 5.
    A.H. Tarry (Report by Royal Signals and Radar Establishment).Google Scholar
  6. 6.
    C. Maugin, Bull. Soc. Franc. Miner. 34, 71 (1911).Google Scholar
  7. 7.
    D.W. Berreman, J. Opt. Soc. Am. 63, 1374 (1973).CrossRefGoogle Scholar
  8. 8.
    J.L. Fergason, Appl. Opt. 7, 1729 (1968).CrossRefGoogle Scholar
  9. 9.
    H.S. Cole, Jr. and S. Aftergut, Appl. Phys. Lett. 31, 58 (1977).Google Scholar

Copyright information

© Springer Science+Business Media New York 1978

Authors and Affiliations

  • H. S. ColeJr.
    • 1
  • S. Aftergut
    • 1
  1. 1.General Electric Corporate Research and DevelopmentSchenectadyUSA

Personalised recommendations