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Modelling nonlinear optical effects in guest-host systems
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).ORCID iD: 0000-0002-1763-9383
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).ORCID iD: 0000-0001-8198-9284
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).ORCID iD: 0000-0003-0007-0394
2005 (English)In: Chinese Optics Letters (COL), ISSN 1671-7694, Vol. 3, no Suppl., S17-S22 p.Article in journal (Refereed) Published
Abstract [en]

We briefly outline a modelling strategy, combining quantum chemistry and molecular dynamics simulations, for obtaining macroscopic nonlinear optical coefficients in guest-host systems like chromophores in solutions or in polymer matrices. The parameters required for the calculation of the macroscopic nonlinear optical property, like the chromophore number density, local field factors, and the order parameter of the chromophore molecules, are derived. These parameters, together with the molecular first hyperpolarizabilities, obtained from quantum chemistry calculations, are used to estimate the macroscopic electro-optic coefficients. The combined approach leads to some new conclusions about the relation of the chromophore property and its solvent interactions in order to optimize the nonlinear optical coefficient. For instance, from the simulation results a totally different notion is derived about the collective properties of octupolar molecules. We find that such molecules receive a solvent induced dipole moment that makes it possible to pole them by an external electric field, but also that they can aggregate as an effect of this solvent interaction.

Place, publisher, year, edition, pages
2005. Vol. 3, no Suppl., S17-S22 p.
Keyword [en]
Chromophores, Molecular dynamics, Molecules, Polymers
National Category
Theoretical Chemistry
URN: urn:nbn:se:kth:diva-156589ScopusID: 2-s2.0-33644654331OAI: diva2:767182

QC 20141201

Available from: 2014-12-01 Created: 2014-12-01 Last updated: 2014-12-01Bibliographically approved

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Ågren, HansTu, YaoquanLuo, Yi
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