Document Detail


Coexisting nematic and smectic-A phases in a twisted liquid-crystal cell.
MedLine Citation:
PMID:  11384280     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Twisted homogeneously planar-aligned nematic liquid-crystal cells are cooled into the smectic- A phase. The expected defective structure does not form. Instead the cells still show good optical-guiding characteristics. Exploration of the cells using a half-leaky guided-mode arrangement reveals that the liquid-crystal phase separates into three or more regions. Adjacent to both the upper and lower boundaries is a region of highly twisted nematic liquid crystal. In the center of the cell is one or more homogeneous smectic- A regions with smectic layers normal to the cell surfaces, separated by twisted nematic. As the cell is cooled so the smectic- A regions grow in thickness with the nematic regions progressively thinning but with increased twist gradient. A theoretical model of these novel results is presented.
Authors:
L Z Ruan; M A Osipov; J R Sambles
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Physical review letters     Volume:  86     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2001 May 
Date Detail:
Created Date:  2001-05-31     Completed Date:  2001-07-19     Revised Date:  2003-10-31    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4548-51     Citation Subset:  -    
Affiliation:
Thin Film Photonics Group, School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL, United Kingdom.
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