| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5373085 | Chemical Physics | 2016 | 9 Pages |
Abstract
We report a novel transient absorption microscope based on a tailor-made femtosecond fiber laser system operating at 250Â kHz. The setup is applied to study PtOEP crystals embedded in a PBMA polymer matrix by analyzing the excited state dynamics in specific points of the sample as well as by spatially resolved excited state dynamics of the crystals. The results reveal the impact of the distortions of the crystal lattice, such as microcracks or amorphous regions caused by non-thermal melting on a lifetime of the excited triplet states of PtOEP crystals. Although transient absorption studies without any spatial resolution of PtOEP in solution and thin films were reported before, the study of spatially resolved excited state dynamics of micrometer-sized PtOEP crystals is performed for the first time to the best of our knowledge.
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Authors
Dar'ya Davydova, Alejandro de la Cadena, Stefan Demmler, Jan Rothhardt, Jens Limpert, Torbjörn Pascher, Denis Akimov, Benjamin Dietzek,