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Ulrike Selig, Florian Langhojer, Frank Dimler, Tatjana Löhrig, Christoph Schwarz, Björn Gieseking, and Tobias Brixner Institut für Physikalische Chemie, Universität Würzburg, Germany and Physikalisches Institut, Universität Würzburg, Germany In recent years, coherent two-dimensional femtosecond spectroscopy, the optical analogue of 2D NMR, has become an established method in the visible spectral range [1]. Its sensitivity to electronic coupling makes 2D spectroscopy an extremely powerful tool to study exciton dynamics and the related energy transfer in multichromophore systems such as molecular J-aggregates. Here we present an inherently phase-stable setup that is simple, robust and works for ultrabroad bandwidths in all spectral regimes (IR/VIS/UV). We explain the underlying principles that ensure its passive phase stability, experimentally prove this stability on all relevant time scales and present first results on a model system. [1] M. Cho, Chem. Rev. 108, 1331 (2008) |
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