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Two-photon absorption strength: a new tool for the quantification of two-photon absorption
Rémy Fortrie1, Henry Chermette
1Laboratoire de Chimie, UMR 5182 du CNRS, Ecole Normale Supérieure de Lyon, 46 Allée d'Italie, F-69364 Lyon Cedex 07, France.
The Journal of Chemical Physics
|June 16, 2006
Summary
Researchers introduce two-photon absorption strength, a new metric for quantifying two-photon absorption in molecules. This tool enables direct comparison of experimental and theoretical data for one-photon transparent systems.
Area of Science:
- Physical Chemistry
- Quantum Chemistry
- Spectroscopy
Background:
- Two-photon absorption (TPA) is crucial for materials science and biophotonics.
- Quantifying TPA properties of one-photon transparent molecules is challenging.
- Existing methods often require arbitrary parameters for data comparison.
Purpose of the Study:
- To define and introduce a novel theoretical tool, the two-photon absorption strength.
- To enable accurate quantification of TPA properties for molecular systems.
- To facilitate direct comparison between experimental and theoretical TPA data.
Main Methods:
- Definition of the two-photon absorption strength.
- Application of theoretical calculations (AM1+CNDOS and HF+CIS3-21G).
- Comparison with experimental data for a model molecule.
Main Results:
- The two-photon absorption strength provides a reliable measure for TPA.
- Numerical values for small molecules are typically around 100.
- The method allows direct comparison of experimental and theoretical results without arbitrary bandwidths.
Conclusions:
- The two-photon absorption strength is a valuable new tool for characterizing TPA.
- It simplifies the analysis and comparison of TPA data.
- This metric enhances the study of molecular systems with TPA properties.
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