Persistent Ground-State Planar Alignment of Iodine Molecule through Resonant Excitation

We demonstrate the generation of a persistent planar molecular alignment by subjecting a relatively warm gas sample to a resonant femtosecond laser pulse. By optically probing I_{2} molecules in their vibronic ground states, we observe a persistent delocalization of their axes near the plane orthogo...

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Veröffentlicht in:Physical review letters 2024-09, Vol.133 (13), p.133201, Article 133201
Hauptverfasser: Bournazel, M, Espaignol, A, Singh, D, Bhalavi, R K, Billard, F, Béjot, P, Hertz, E, Faucher, O
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Sprache:eng
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Zusammenfassung:We demonstrate the generation of a persistent planar molecular alignment by subjecting a relatively warm gas sample to a resonant femtosecond laser pulse. By optically probing I_{2} molecules in their vibronic ground states, we observe a persistent delocalization of their axes near the plane orthogonal to the field direction. This phenomenon is attributed to the one-photon resonant excitation, primarily removing molecules from the thermal ground-state distribution that are initially aligned along the field, i.e., those with small projection of their rotational angular momentum along the field.
ISSN:0031-9007
1079-7114
1079-7114
DOI:10.1103/PhysRevLett.133.133201