Thienyl-bridged oligomeric squaraines of the indole series: synthesis and optical properties

Walter Grahn; Ulf Lawrentz; Dieter Scherer; Robert Doerfler; Andreas Feldner; Markus Schwoerer; Christoph Lambert; Ina Dix; Peter George Jones

doi:10.1117/12.449849

7 December 2001 Thienyl-bridged oligomeric squaraines of the indole series: synthesis and optical properties

Walter Grahn, Ulf Lawrentz, Dieter Scherer, Robert Doerfler, Andreas Feldner, Markus Schwoerer, Christoph Lambert, Ina Dix, Peter George Jones

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Proceedings Volume 4461, Linear and Nonlinear Optics of Organic Materials; (2001) https://doi.org/10.1117/12.449849
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The third-order optical polarizabilities (gamma) of a new homologous series of oligomeric squaraines of the indole series (monomer-pentamer) and of corresponding monomers were investigated by degenerate four wave mixing (DFWM) at 1064 nm and related to results from two-photon absorption experiments in an energy range from 1.75 to 3.2 eV. Important two-photon contributions can be deduced to vibronic coupling and the influence to (gamma) has been considered within a four-level model. The nature of the subchromophore interaction within the oligomers can succesfully be described as mainly electrostatic within the framework of simple exciton coupling theory.

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Walter Grahn, Ulf Lawrentz, Dieter Scherer, Robert Doerfler, Andreas Feldner, Markus Schwoerer, Christoph Lambert, Ina Dix, and Peter George Jones "Thienyl-bridged oligomeric squaraines of the indole series: synthesis and optical properties", Proc. SPIE 4461, Linear and Nonlinear Optics of Organic Materials, (7 December 2001); https://doi.org/10.1117/12.449849

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