Descriptive chemistry of self-assembled multilayer second-order NLO materials. Chemical, microstructural and performance interrelationships

Shlomo Yitzchaik*, Ashok K. Kakkar, Stephen B. Roscoe, Tobin J. Marks, Paul M. Lundquist, Weiping Lin, George K. Wong

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

5 Scopus citations


The construction of covalently self-assembled second-order nonlinear optical (NLO) materials containing stilbazole or alkynyl-type high-β chromophores acentrically organized on inorganic oxide substrates is discussed. These structurally different chromophores exhibit differing packing densities on the surface when introduced under the same reaction conditions. In the stilbazolium chromophores, ion-exchange of the chloride counter-anion with very large anionic organic dyes results in appreciably enhanced second harmonic generation (SHG) efficiency. The frequency-dependent SHG response for self-assembled monolayers derived from the alkynyl-type chromophore was also investigated. The linear absorption spectra exhibit two maxima in the visible region which are assigned to electronically isolated chromophores (480 nm) and aggregated species (540 nm). The dispersion of the second-order NLO coefficient reveals that both microstructures are NLO-active. The origin of the SHG response from both assemblies is discussed.

Original languageAmerican English
Title of host publicationElectrical, Optical, and Magnetic Properties of Organic Solid State Materials
EditorsAnthony F. Garito, Alex K-Y. Jen, Charles Y-C. Lee, Larry R. Dalton
PublisherPubl by Materials Research Society
Number of pages9
ISBN (Print)1558992278
StatePublished - 1994
Externally publishedYes
EventProceedings of the MRS 1993 Fall Meeting - Boston, MA, USA
Duration: 29 Nov 19933 Dec 1993

Publication series

NameMaterials Research Society Symposium Proceedings
ISSN (Print)0272-9172


ConferenceProceedings of the MRS 1993 Fall Meeting
CityBoston, MA, USA


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