Echo-assisted impulsive alignment of room-temperature acetone molecules - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Physical Review Research Année : 2021

Echo-assisted impulsive alignment of room-temperature acetone molecules

Résumé

We experimentally and theoretically investigate the field-free alignment of the asymmetric-top acetone molecule. Our study shows that the production of postpulse aligned molecules in a dense sample (0.05-0.2 bar) of room-temperature acetone using a single-pulse excitation can be significantly improved by rotational alignment echoes induced in a two-pulse excitation scheme. We report the observation of fractional echoes that can be used to reveal the nonlinearity of the molecular system. In a proof-of-principle experiment, a pre-aligned sample of acetone is also used for third-harmonic generation. The analysis of the experimental data with numerical simulations based on quantum and classical models enables the determination of the collisional decay rate of acetone alignment, as well as a test of the static, second-order, electric hyperpolarizabilities of the molecule derived from ab initio calculations presented in this work.
Fichier principal
Vignette du fichier
Echo_acetoneV13.pdf (744.3 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03266015 , version 1 (21-06-2021)
hal-03266015 , version 2 (14-03-2023)

Identifiants

Citer

Junyang Ma, Laurent H. Coudert, F. Billard, M. Bournazel, B. Lavorel, et al.. Echo-assisted impulsive alignment of room-temperature acetone molecules. Physical Review Research, 2021, 3 (2), ⟨10.1103/PhysRevResearch.3.023192⟩. ⟨hal-03266015v2⟩
69 Consultations
73 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More