Nonlinear optical effects induced by nanoparticles in symmetric molecules

Tim Hansen, Thorsten Hansen, Vaida Arcisauskaite, Kurt V. Mikkelsen, Jacob Kongsted, Vladimiro Mujica

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

We present theoretical methods and computations of the effects of nanoparticles on nonlinear optical properties of symmetric molecules. We utilize quantum mechanical/molecular mechanics (QM/MM) response methods for calculating electromagnetic properties of molecules interacting with nanoparticles, and we report calculations of the frequency-dependent first hyperpolarizability. The frequency-dependent first hyperpolarizability of (p)-benzenedithiol in the presence of zero, one, or two gold nanoparticles of varying sizes and distances is calculated by DFT/MM. The hyperpolarizability of the molecule depends strongly on the distance between the nanoparticles and the molecule, whereas the size of the nanoparticle is of little importance. We clearly show that metal nanoparticles are able to induce a first hyperpolarizability in symmetric molecules.

Original languageEnglish (US)
Pages (from-to)20870-20876
Number of pages7
JournalJournal of Physical Chemistry C
Volume114
Issue number48
DOIs
StatePublished - Dec 9 2010

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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