Diffraction efficiency enhancement caused by employing liquid crystal phthalonitrile derivative in nematic liquid crystals

Koysal O., Okutan M., San S. E., Durmus M., Ecevit F. N., Ahsen V.

DYES AND PIGMENTS, vol.73, no.1, pp.98-102, 2007 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 73 Issue: 1
  • Publication Date: 2007
  • Doi Number: 10.1016/j.dyepig.2005.10.020
  • Journal Name: DYES AND PIGMENTS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.98-102
  • Keywords: nematic liquid crystal, phthalonitrile derivative, grating diffraction, MOLECULAR-REORIENTATION, DYE, POLYMERS, FULLERENE, BEHAVIOR, STORAGE, SYSTEM, RED
  • Kocaeli University Affiliated: Yes

Abstract

The change of refractive index, originated by photoinduced molecular reorientation, brings about a significant diffraction capability in E7 coded nematic liquid crystal system doped by 2,3-dicyano-1,4-di[3,4,5-tri(dodecyloxy)phenylcarbonyloxy]benzene (DCDPB) which is called as liquid crystal phthalonitrile derivative. Results of a grating diffraction experiment are reported for the constructed sample. The accessible diffraction efficiency, eta, is roughly of the order of 10% under the optimum conditions and analysed results propose this novel system to be appropriate and promising for the excitation wavelength of a 632.8 nm He-Ne laser. (c) 2005 Elsevier Ltd. All rights reserved.