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

Yoshinori Okada, Fumito Araoka, Yoichi Takanishi, Ken Ishikawa, Shoichiro Nakahara, Keiki Kishikawa, Hyunhee Choi, Jeong Weon Wu, Hideo Takezoe

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8 Scopus citations


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.

Original languageEnglish
Article number050701
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Issue number5
StatePublished - 10 May 2007


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