Characterization of the chromophore orientation of rhodamine B amphiphiles in Langmuir-Blodgett monolayers

Ken Ichi Ishibashi, Osamu Sato, Ryo Baba, D. A. Tryk, Kazuhito Hashimoto, Akira Fujishima

研究成果: Contribution to journalArticle

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SHG (second harmonic generation) interferometry and linear dichroism measurements were applied to the characterization of Langmuir-Blodgett monolayers composed of rhodamine B derivatives on hydrophilic fused silica substrates. When excited with a Nd-YAG laser, the contribution of dimeric species composed of rhodamine B chromophores to the nonlinear optical behavior was large, even though the relative concentration of the dimers was small. This implies the formation of noncentrosymmetrically oriented dimers with a relatively higher nonlinear molecular susceptibility, β. Therefore, a unique phenomenon was observed; that is, the relative phase of the SH light shifted depending on the incident light polarization (p and s). In addition, it was found that the relatively standing up orientation was favored for the dimer, while a strongly tilted orientation was favored for the monomer.

元の言語英語
ページ(範囲)361-363
ページ数3
ジャーナルJournal of Colloid And Interface Science
233
発行部数2
DOI
出版物ステータス出版済み - 1 15 2001
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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