11 October 2012 Measurement of excited-state absorption cross sections of a novel platinum complex in picosecond top-hat Z-scan experiments employing partially coherent beams
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Proceedings Volume 8474, Optical Processes in Organic Materials and Nanostructures; 847404 (2012); doi: 10.1117/12.928852
Event: SPIE Organic Photonics + Electronics, 2012, San Diego, California, United States
Abstract
In top-hat Z scans that employ tunable sources such as optical parametric generators without line-narrowing gratings, the size of the aperture used to clip the beam may exceed the coherence length, and the variation with z of the transverse profile of the resulting partially coherent beam may differ significantly from that of a perfect top-hat beam. After a careful validation of our experimental set-up, we perform picosecond open-aperture Z scans with a top-hat beam at selected wavelengths in the visible and nanosecond open-aperture Z scans with a spatially Gaussian beam at 532-nm wavelength on a toluene solution of a particular platinum(II) 2,2′-bipyridyl complex bearing naphthalimidylethynyl-substituted fluorenylacetylide ligands. We report values of the singlet and triplet excited-state absorption cross sections of the complex.
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Timothy M. Pritchett, Michael J. Ferry, William Shensky, Andrew G. Mott, Rui Liu, Wenfang Sun, "Measurement of excited-state absorption cross sections of a novel platinum complex in picosecond top-hat Z-scan experiments employing partially coherent beams", Proc. SPIE 8474, Optical Processes in Organic Materials and Nanostructures, 847404 (11 October 2012); doi: 10.1117/12.928852; https://doi.org/10.1117/12.928852
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KEYWORDS
Absorption

Picosecond phenomena

Platinum

Data modeling

Gaussian beams

Quantum efficiency

Solids

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