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Article Dans Une Revue Proceedings of SPIE, the International Society for Optical Engineering Année : 2013

Symmetry loss of heptamethine cyanines: an example of dipole generation by ion-pairing effect

Simon Pascal
Boris Le Guennic
Stephane Parola
Olivier Maury

Résumé

The development of near-infrared dyes for third order nonlinear optical applications and particularly for optical power limiting at telecommunications wavelengths triggered the revival of old dyes like polymethine dyes featuring an odd number of carbon atoms. Currently numerous research endeavor is focused on the understanding of their spectroscopy in solution and in the solid state in close relationship with their electronic structure. In this context, the dramatic effect of the counter ion on the heptamethine optical properties was highlighted depending on the dissociating character of the media. The unusual consideration of this parameter allows us to explore the so-called "cyanine limit" and to finely tune the heptamethine absorption in view of future use as dopant in a material for optical limiting applications.
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hal-01245529 , version 1 (23-07-2020)

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Simon Pascal, Pierre-Antoine Bouit, Boris Le Guennic, Stephane Parola, Olivier Maury, et al.. Symmetry loss of heptamethine cyanines: an example of dipole generation by ion-pairing effect. Proceedings of SPIE, the International Society for Optical Engineering, 2013, Organic Photonic Materials and Devices XV;, 8622, pp.86220F. ⟨10.1117/12.2008220⟩. ⟨hal-01245529⟩
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