Rotated echoes of molecular alignment: fractional, high order and imaginary

Lin, Kang; Ma, Jing; Gong, Xiaochun; Song, Qiying; Ji, Qinying; Zhang, Wenbing; Li, Hanxiao; Lu, Peifen; Li, Hui; Zeng, Heping; Wu, Jian; Hartmann, Jean‐Michel; Faucher, O.; Gershnabel, E.; Prior, Yehiam; Averbukh, Ilya Sh.

doi:10.1364/oe.25.024917

Cited by 18 publications

(12 citation statements)

References 29 publications

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“…In addition to the fundamental importance of this generic effect, the echoes found multiple applications, mostly as a platform for measuring dephasing processes caused by irreversible dissipation. Recently, a new kind of echoes was discovered in the rotational motion of molecules, the so-called rotational alignment echoes, including regular, high-order and fractional echoes [13,14], rotated and imaginary echoes [15,16], and the echo-enabled rephasing of centrifugal distortions [17].…”

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confidence: 99%

Rotational Echoes as a Tool for Investigating Ultrafast Collisional Dynamics of Molecules

et al. 2019

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We show that recently discovered rotational echoes of molecules provide an efficient tool for studying collisional molecular dynamics in high-pressure gases. Our study demonstrates that rotational echoes enable the observation of extremely fast collisional dissipation, at time scales of the order of few picoseconds, and possibly shorter. The decay of the rotational alignment echoes in CO2 gas and CO2-He mixture up to 50 bar was studied experimentally, delivering collision rates that are in good agreement with the theoretical expectations. The suggested measurement protocol may be used in other high-density media, and potentially in liquids.

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Rotational Echoes as a Tool for Investigating Ultrafast Collisional Dynamics of Molecules

et al. 2019

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“…1a). Further investigations, still carried at pressures for which collisional effects are negligible at the investigated time scales, revealed the existence of fractional, imaginary, and rotated echoes [14,[19][20][21]. The collisional dissipation of echoes was studied later [13,14], by varying the delay 12 τ for fixed gas densities.…”

Section: Introductionmentioning

confidence: 98%

Molecular alignment echoes probing collision-induced rotational-speed changes

Hartmann

Delahaye

et al. 2020

Phys. Rev. Research

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We show that the decays with pressure of the alignment echoes induced in N 2 O-He gas mixtures by two laser pulses with various delays bring detailed information on collision-induced changes of the rotational speed. Measurements and classical calculations consistently demonstrate that collisions reduce the echo amplitude all the more efficiently when the echo appears late. We quantitatively explain this behavior by the filamentation of the classical rotational phase space induced by the first pulse and the narrowing of the filaments with time. The variation of the echo decay thus reflects the ability of collisions to change the molecular rotation speed by various amounts, enabling refined tests of models for the dissipation induced by intermolecular forces. We also demonstrate that the collision-induced changes of the rotational speed within the filaments are the classical equivalents of the nonsecular exchanges among quantum coherences.

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“…Using the coincident CEI technique, Lin et al 37,171 thoroughly investigated the phenomenon of rotational echoes and discovered two new types of rotational alignment echoes, namely rotated echoes and imaginary echoes. The underlying mechanisms of rotated and imaginary echoes can be understood by analyzing the phase space evolution (see Sec.…”

Section: Rotated and Imaginary Echoesmentioning

confidence: 99%

Spatiotemporal rotational dynamics of laser-driven molecules

Lin

Tutunnikov

et al. 2020

Adv. Photon.

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Molecular alignment and orientation by laser fields has attracted significant attention in recent years, mostly due to new capabilities to manipulate the molecular spatial arrangement. Molecules can now be efficiently prepared for ionization, structural imaging, orbital tomography, and more, enabling, for example, shooting of dynamic molecular movies. Furthermore, molecular alignment and orientation processes give rise to fundamental quantum and classical phenomena like quantum revivals, Anderson localization, and rotational echoes, just to mention a few. We review recent progress on the visualization, coherent control, and applications of the rich dynamics of molecular rotational wave packets driven by laser pulses of various intensities, durations, and polarizations. In particular, we focus on the molecular unidirectional rotation and its visualization, the orientation of chiral molecules, and the three-dimensional orientation of asymmetric-top molecules. Rotational echoes are discussed as an example of nontrivial dynamics and detection of prepared molecular states.

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Rotated echoes of molecular alignment: fractional, high order and imaginary

Cited by 18 publications

References 29 publications

Rotational Echoes as a Tool for Investigating Ultrafast Collisional Dynamics of Molecules

Rotational Echoes as a Tool for Investigating Ultrafast Collisional Dynamics of Molecules

Molecular alignment echoes probing collision-induced rotational-speed changes

Spatiotemporal rotational dynamics of laser-driven molecules

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