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Article Dans Une Revue Optics Express Année : 2023

Artifact-free balanced detection for the measurement of circular dichroism with a sub-picosecond time resolution

Pascale Changenet

Résumé

Here we present the development of a subpicosecond spectropolarimeter enabling high sensitivity balanced detection of time-resolved circular dichroism (TRCD) signals from chiral sample in solution. The signals are measured with a conventional femtosecond pump-probe set-up using the combination of a quarter-waveplate and a Wollaston prism. This simple and robust method allows access to TRCD signals with improved signal-to-noise ratio and very short acquisition times. We provide a theoretical analysis of the artifacts of such detection geometry and the strategy to eliminate them. We illustrate the potential of this new detection with the study of the [Ru(phen) 3 ]·2PF 6 complexes in acetonitrile.
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Dates et versions

hal-04124276 , version 1 (10-10-2023)

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Pascale Changenet, François Hache. Artifact-free balanced detection for the measurement of circular dichroism with a sub-picosecond time resolution. Optics Express, 2023, 31 (13), pp.21296. ⟨10.1364/OE.489468⟩. ⟨hal-04124276⟩
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