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  Second-harmonic generation in quinquethienyl monolayers.

Marowsky, G., Steinhoff, R., Chi, L., Hutter, J., & Wagnière, G. (1988). Second-harmonic generation in quinquethienyl monolayers. Physical Review B, 38(9), 6274-6278. doi:10.1103/PhysRevB.38.6274.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-464F-7 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-4651-0
Genre: Journal Article

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 Creators:
Marowsky, G.1, Author              
Steinhoff, R.1, Author              
Chi, L.2, Author              
Hutter, J., Author
Wagnière, G., Author
Affiliations:
1Abteilung Laserphysik, MPI for biophysical chemistry, Max Planck Society, ou_578547              
2Research Group of Molecular Organized Systems, MPI for biophysical chemistry, Max Planck Society, ou_578548              

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 Abstract: Well-organized monolayers of quinquethienyl (QT) have been studied by second-harmonic generation (SHG). Due to the properties of the molecular hyperpolarizability tensor α(2) of QT, SHG signals originating from the direction of the surface normal, which corresponds also to the alignment direction of these molecules of rodlike structure, are symmetry-forbidden. The observed intense SHG signals under p-polarized excitation can either be explained in terms of anisotropic averaging, which accounts for orientational irregularities on a microscopic scale due to steric hindrance or, alternatively, by the influence of an external, symmetry-breaking, static electric field acting on the individual molecules and arising from their noncentrosymmetric environment.

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Language(s): eng - English
 Dates: 1988-09-15
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevB.38.6274
 Degree: -

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Title: Physical Review B
Source Genre: Journal
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Pages: - Volume / Issue: 38 (9) Sequence Number: - Start / End Page: 6274 - 6278 Identifier: -