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Field-Free Molecular Orientation Generated from Cyclic Rotational States by Using Two Trains of Half-Cycle Pulses |
| HUANG Yu-Xin1;YANG Yu-Jun1,2;ZHU Hong-Yu1;WANG Li1;WANG Hui1;ZHU Qi-Ren1 |
| 1Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012 2Institute of Theoretical Chemistry, Jilin University, Changchun 130012 |
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HUANG Yu-Xin, YANG Yu-Jun, ZHU Hong-Yu et al 2007 Chin. Phys. Lett. 24 3111-3114 |
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Abstract We show that two trains of half-cycle pulses (HCPs) with different amplitudes irradiating alternately on polar molecules can achieve a remarkable enhancement of field-free orientation compared with the case of an equal amplitude HCPs train for the same pulse separation. This kind of orientation enhancements is mainly due to an optimal adjustment of the population distribution on every field-free angular momentum eigenstate, in which the populations on the undesired states of high angular momenta are effectively suppressed, and the populations on the desired states of low angular momenta are correspondingly promoted.
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32.80.Lg
02.30.Yy
33.80.-b
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Received: 02 April 2007
Published: 23 October 2007
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