期刊
JOURNAL OF CHEMICAL PHYSICS
卷 139, 期 22, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4837718
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资金
- Alexander von Humboldt Professorship
- ERC Synergy grant BioQ
- EU Integrating project SIQS and STREP PAPETS
- Spanish Ministerio de Economia y Competitividad [FIS2012-30625]
- Winton Programme for the Physics of Sustainability
New experimental techniques based on nonlinear ultrafast spectroscopies have been developed over the last few years, and have been demonstrated to provide powerful probes of quantum dynamics in different types of molecular aggregates, including both natural and artificial light harvesting complexes. Fourier transform-based spectroscopies have been particularly successful, yet complete spectral information normally necessitates the loss of all information on the temporal sequence of events in a signal. This information though is particularly important in transient or multi-stage processes, in which the spectral decomposition of the data evolves in time. By going through several examples of ultrafast quantum dynamics, we demonstrate that the use of wavelets provide an efficient and accurate way to simultaneously acquire both temporal and frequency information about a signal, and argue that this greatly aids the elucidation and interpretation of physical process responsible for non-stationary spectroscopic features, such as those encountered in coherent excitonic energy transport. (C) 2013 AIP Publishing LLC.
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