Probing molecular photophysics in a matter-wave interferometer

• URL: http://arxiv.org/abs/2407.18775v2
• Date: Mon, 27 Jan 2025 14:43:18 GMT
• Title: Probing molecular photophysics in a matter-wave interferometer
• Authors: Lukas Martinetz, Benjamin A. Stickler, Ksenija Simonović, Richard Ferstl, Christian Brand, Markus Arndt, Klaus Hornberger,
• Abstract summary: We show that matter-wave diffraction off a single standing laser wave can be used as an accurate measurement scheme for photophysical molecular parameters. These include state-dependent optical polarizabilities and photon-absorption cross sections, the relaxation rates for fluorescence, internal conversion, and intersystem crossing.
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• Abstract: We show that matter-wave diffraction off a single standing laser wave can be used as an accurate measurement scheme for photophysical molecular parameters. These include state-dependent optical polarizabilities and photon-absorption cross sections, the relaxation rates for fluorescence, internal conversion, and intersystem crossing, as well as ionization or cleavage probabilities. We discuss how the different photophysical processes manifest as features of the interference pattern, and we determine the accuracy of molecular parameters estimated from a realistic measurement with finite particle numbers. The analysis is based on an analytic calculation in Wigner representation, which accounts for the laser-induced coherent and incoherent dynamics, for the finite longitudinal and transverse coherence in the matter-wave beam, the gravitational and Coriolis acceleration, and an imperfect standing laser wave.

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