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

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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 (US)
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
StatePublished - Feb 1 1994

Funding

Materials Research Center of Northwestern University (Grant DMR9120521) and by the Air Force Office of Scientific Research (Contract 90-0071). A.K.K. thanks NSERC of Canada for a post-doctoral fellowship.

ASJC Scopus subject areas

  • Condensed Matter Physics

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