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Chin. Opt. Lett.
 Home  List of Issues    Issue 04 , Vol. 16 , 2018    10.3788/COL201816.040203


Controlling nonadiabatic spectral redshift of high-order harmonic using two orthogonally polarized laser fields
Hongmei Wu1;2, Shengjun Yue1;2, Jinbin Li1;2, Silin Fu1;2, Bitao Hu1;2, and Hongchuan Du1;2
1 School of Nuclear Science and Technology, [Lanzhou University], Lanzhou 730000, China
2 Key Laboratory of Special Function Materials and Structure Design, Ministry of Education, [Lanzhou University], Lanzhou 730000, China

Chin. Opt. Lett., 2018, 16(04): pp.040203

DOI:10.3788/COL201816.040203
Topic:Atomic and molecular physics
Keywords(OCIS Code): 020.2649  320.7110  300.6170  

Abstract
We investigate the nonadiabatic spectral redshift of high-order harmonic of He driven by two time-delayed orthogonally polarized laser fields. It is found that the nonadiabatic spectral redshift can be observed by properly adjusting the time delay of the two laser fields when the controlling pulse is added in the raising part of the driving pulse in the vertical direction. That is because the controlling pulse in the vertical direction prevents the ionized electrons from returning to the vicinity of parent ions and then reduces the recombination probability. This leads to the high-order harmonic generated mainly in the falling part of the driving pulse. Meanwhile, we also find that the quantity of redshift can be effectively controlled through accommodating the positive time delays. In addition, this scheme can also be used to produce nonadiabatic spectral blueshift.

Copyright: © 2003-2012 . This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Received:2018/1/19
Accepted:2018/2/9
Posted online:2018/3/28

Get Citation: Hongmei Wu, Shengjun Yue, Jinbin Li, Silin Fu, Bitao Hu, and Hongchuan Du, "Controlling nonadiabatic spectral redshift of high-order harmonic using two orthogonally polarized laser fields," Chin. Opt. Lett. 16(04), 040203(2018)

Note: This work was supported by the National Natural Science Foundation of China (NSFC) (Nos. 11404153, 11135002, 11604119, and 11405077) and the Fundamental Research Funds for the Central Universities of China (No. lzujbky-2017-14).



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