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Electro-optic Kerr effect in the isotropic phase above the columnar phase of a urea derivative

Title
Electro-optic Kerr effect in the isotropic phase above the columnar phase of a urea derivative
Authors
Okada Y.Araoka F.Takanishi Y.Ishikawa K.Nakahara S.Kishikawa K.Choi H.Wu J.W.Takezoe H.
Ewha Authors
우정원
SCOPUS Author ID
우정원scopus
Issue Date
2007
Journal Title
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
ISSN
1539-3755JCR Link
Citation
vol. 75, no. 5
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
The authors have measured the electro-optic Kerr effect in the isotropic phase of a urea derivative. Electric-field-induced birefringence Δn was observed in the isotropic phase even 30 °C above the isotropic-columnar phase transition temperature. The induced birefringence is inversely proportional to temperature, as predicted by the Landau-de Gennes theory. Two distinct regions are identified from the proportionality constants in the isotropic phase; optical second-harmonic generation (SHG) is easily observable in the low-temperature region on applying an electric field, whereas SHG activity does not emerge in the higher-temperature region. The structure of molecular assemblies is discussed based on these experimental results. © 2007 The American Physical Society.
DOI
10.1103/PhysRevE.75.050701
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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