Optical Properties of 4-Octyl-4'-Cyanobiphenyl Liquid-Crystalline Free-Standing Films

The optical properties of 4-octyl-4'-cyanobiphenyl (8CB) liquid-crystalline free-standing films (FSFs) were studied. The theoretical characteristics of the smectic A (SmA) phase FSF were determined using the analytical method. The incidence angle dependence of the phase difference for 100 8CB-F...

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Bibliographic Details
Published inJapanese Journal of Applied Physics Vol. 44; no. 1S; p. 582
Main Authors Matsuhashi, Nobuaki, Okumoto, Yoshitaka, Kimura, Munehiro, Akahane, Tadashi
Format Journal Article
LanguageEnglish
Published 01.01.2005
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Summary:The optical properties of 4-octyl-4'-cyanobiphenyl (8CB) liquid-crystalline free-standing films (FSFs) were studied. The theoretical characteristics of the smectic A (SmA) phase FSF were determined using the analytical method. The incidence angle dependence of the phase difference for 100 8CB-FSFs was measured by transmission ellipsometry using a photoelastic modulator (PEM). The number of layers could clearly be separated from 2 to 9 layers. As a result of the least-squares fitting in all the films, the same anisotropies of the refractive indices n || =1.665 and n ⊥ =1.523 were obtained, and the layer spacing became approximately 2.3 nm.
ISSN:0021-4922
1347-4065
DOI:10.1143/JJAP.44.582