The effect of chromophore architecture and deposition conditions on the optical and microstructural characteristics of self-assembled chromophoric thin film nlomaterials

Shlomo Yitzchaik, Ashok K. Kakkar, Stephen B. Roscoe, Yuji Orihashi, Tobin J Marks, Weiping Lin, George K. Wong

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Abstract

Construction on inorganic oxide substrates of covalently self-assembled second-order nonlinear optical (NLO) materials containing a variety of acentrically organized high-Yβ chromophores is investigated as a function of film deposition conditions. Structurally different chromophores exhibit varying packing arrangements on the surface. Changing the medium for the chromophore deposition reaction on functionalized surfaces from a polar solvent to a nonpolar solvent and raising the temperature increases the chromophore number density on the surface and yields improved NLO response. These robust thin film materials show very high second harmonic generation (SHG) efficiencies with for ~ 25 À thick monolayers of up to 7 x 10-7 esu at 1064 nm.

Original languageEnglish
Pages (from-to)9-16
Number of pages8
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Volume240
Issue number1
DOIs
Publication statusPublished - Feb 1 1994

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ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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