Orientation and Alignment Echoes

G. Karras, E. Hertz, F. Billard, B. Lavorel, J.-M. Hartmann, O. Faucher, Erez Gershnabel, Yehiam Prior, and Ilya Sh. Averbukh
Phys. Rev. Lett. 114, 153601 – Published 15 April 2015
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Abstract

We present one of the simplest classical systems featuring the echo phenomenon—a collection of randomly oriented free rotors with dispersed rotational velocities. Following excitation by a pair of time-delayed impulsive kicks, the mean orientation or alignment of the ensemble exhibits multiple echoes and fractional echoes. We elucidate the mechanism of the echo formation by the kick-induced filamentation of phase space, and provide the first experimental demonstration of classical alignment echoes in a thermal gas of CO2 molecules excited by a pair of femtosecond laser pulses.

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  • Received 27 January 2015

DOI:https://doi.org/10.1103/PhysRevLett.114.153601

© 2015 American Physical Society

Authors & Affiliations

G. Karras1, E. Hertz1, F. Billard1, B. Lavorel1, J.-M. Hartmann2, and O. Faucher1,*

  • 1Laboratoire Interdisciplinaire CARNOT de Bourgogne, UMR 6303 CNRS-Université de Bourgogne, BP 47870, 21078 Dijon, France
  • 2Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA) CNRS (UMR 7583), Université Paris Est Créteil, Université Paris Diderot, Institut Pierre-Simon Laplace, Université Paris Est Créteil, 94010 Créteil Cedex, France

Erez Gershnabel, Yehiam Prior, and Ilya Sh. Averbukh

  • Department of Chemical Physics, The Weizmann Institute of Science, Rehovot 76100, Israel

  • *olivier.faucher@u-bourgogne.fr
  • ilya.averbukh@weizmann.ac.il

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Issue

Vol. 114, Iss. 15 — 17 April 2015

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