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Field-Free Molecular Orientation Induced by a Single-Cycle THz Laser Pulse Train

Field-Free Molecular Orientation Induced by a Single-Cycle THz Laser Pulse Train
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Year:    2016

Communications in Computational Physics, Vol. 20 (2016), Iss. 3 : pp. 689–702

Abstract

We investigate theoretically the field-free orientation of CO molecules induced by a single-cycle THz laser pulse train. It is shown that the molecular orientation can be obviously enhanced by applying the pulse train. The laser intensity and pulse number have some effects on the molecular orientation. The high degree of field-free molecular orientation $|$$〈$cos$θ$$〉$$|$max=0.9246 is obtained at temperature $T$=0 K. The variations of the maximum orientation degree with the experimentally available pulse number and peak intensity are given. Temperature $T$ has a considerable influence on the field-free molecular orientation. The maximal field-free molecular orientation at $T$=0, 10, 20 and 30 K for $N$=14 and $E_0$=1.8 MV/cm are $|$$〈$cos$θ$$〉$$|$max=0.9188, 0.7338, 0.6055 and 0.5154 in order, and the corresponding effective duration times of molecular orientation are $∆t$=0.759, 0.432, 0.297 and 0.117 ps.

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Journal Article Details

Publisher Name:    Global Science Press

Language:    English

DOI:    https://doi.org/10.4208/cicp.OA-2015-0001

Communications in Computational Physics, Vol. 20 (2016), Iss. 3 : pp. 689–702

Published online:    2016-01

AMS Subject Headings:    Global Science Press

Copyright:    COPYRIGHT: © Global Science Press

Pages:    14

Keywords:   

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