Generalized few-state models for two-photon absorption of conjugated molecules

We present three- and four-state models for two-photon absorption (TPA) cross-sections generalized to include dipolar direction information and polarization effects of the laser beam. By introducing an effective dipole moment which incorporates the directions of the transition dipole moments and the...

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Veröffentlicht in:	Chemical physics letters 2002, Vol.352 (3), p.262-269
Hauptverfasser:	Cronstrand, Peter, Luo, Yi, Ågren, Hans
Format:	Artikel
Sprache:	eng
Schlagworte:	2-photon absorption Atomic and molecular physics chromophores cross-sections design dyes Exact sciences and technology Fundamental areas of phenomenology (including applications) Intensities and shapes of molecular spectral lines and bands Molecular properties and interactions with photons Nonlinear optics oligomers Optical susceptibility, hyperpolarizability Optics Oscillator and band strengths, lifetimes, transition moments, and franck-condon factors Physics spectrum
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Zusammenfassung:	We present three- and four-state models for two-photon absorption (TPA) cross-sections generalized to include dipolar direction information and polarization effects of the laser beam. By introducing an effective dipole moment which incorporates the directions of the transition dipole moments and the influence of additionally strongly coupled excited states we can distinguish between different effects leading to enhanced two-photon absorption.
ISSN:	0009-2614 1873-4448 1873-4448
DOI:	10.1016/S0009-2614(01)01454-3