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Conferences > QELS > 1996 > QMA > QMA8
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper QMA8

Third order hyperpolarizabilities of cyanines: measurements and calculations of the chain length dependence

W. Werncke, T. Johr, M. Pfeiffer, A. Lau, and L. Dähne

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Abstract

Cyanines with long chains exhibit very high third order hyperpolarizabilities γ, which have been connected to the bond equalization in the π-chain. However a sign reversal of hyperpolarizabilities of short chains has been explained by bond alternation,1,2 To correlate measured optical nonlinearities with molecular structures, e.g., chain-lengths dependences of homologous series, it is necessary to take into account the dispersion of γ which is strongly affected by structural changes.

© 1996 Optical Society of America

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