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

P. Changenet; F. Hache

doi:10.1117/12.2691345

12 March 2024 Artifact-free balanced detection for the measurement of circular dichroism with a sub-picosecond time resolution

P. Changenet, F. Hache

Author Affiliations +

Proceedings Volume 12845, Polarized Light and Optical Angular Momentum for Biomedical Diagnostics 2024; 1284508 (2024) https://doi.org/10.1117/12.2691345
Event: SPIE BiOS, 2024, San Francisco, California, United States

Abstract

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]·2PF₆ complexes in acetonitrile.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

P. Changenet and F. Hache "Artifact-free balanced detection for the measurement of circular dichroism with a sub-picosecond time resolution", Proc. SPIE 12845, Polarized Light and Optical Angular Momentum for Biomedical Diagnostics 2024, 1284508 (12 March 2024); https://doi.org/10.1117/12.2691345

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