The Effect of Chromophore Architecture and Deposition Conditions on the Optical and Microstructural Characteristics of Self-Assembled Chromophoric Thin Film NLO Materials
- 1 February 1994
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 240 (1) , 9-16
- https://doi.org/10.1080/10587259408029710
Abstract
Construction on inorganic oxide substrates of covalently self-assembled second-order nonlinear optical (NLO) materials containing a variety of acentrically organized high-β 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 chromophorc 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 X (2) zzz for ∼ 25 Å thick monolayers of up to 7 × 10−7 esu at 1064 nm.Keywords
This publication has 10 references indexed in Scilit:
- Chromophoric self-assembled NLO multilayer materials: real time observation of monolayer growth and microstructural evolution by in situ second harmonic generation techniquesThe Journal of Physical Chemistry, 1993
- An enhanced odd-even effect of liquid crystal dimers Orientational order in the α,ω-bis(4′-cyanobiphenyl-4-yl)alkanesLiquid Crystals, 1993
- Chromophoric self-assembled nonlinear optical multilayer materials. Synthesis, properties, and structural interconversions of assemblies with rodlike alkynyl chromophoresLangmuir, 1993
- Electron donor-acceptor complexes as potential high-efficiency second-order nonlinear optical materials. A computational investigationJournal of the American Chemical Society, 1993
- Calculation of quadratic hyperpolarizabilities for organic π electron chromophores: Molecular geometry sensitivity of second‐order nonlinear optical responseInternational Journal of Quantum Chemistry, 1992
- Improved second-harmonic generation from Langmuir–Blodgett films of hemicyanine dyesNature, 1992
- Materials for Nonlinear OpticsACS Symposium Series, 1991
- Chromophoric self-assembled multilayers. Organic superlattice approaches to thin-film nonlinear optical materialsJournal of the American Chemical Society, 1990
- Determination of molecular orientation in molecular monolayers by second-harmonic generationJournal of the Optical Society of America B, 1990
- On the formation and structure of self-assembling monolayers. I. A comparative atr-wettability study of Langmuir—Blodgett and adsorbed films on flat substrates and glass microbeadsJournal of Colloid and Interface Science, 1984