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Tunable enhancement of harmonic radiation in coupled quantum wells

  • Regular Article – Nonlinear Dynamics
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The European Physical Journal D Aims and scope Submit manuscript

Abstract

A few-cycle ultrashort laser field propagating through strongly coupled quantum wells (CQW) is numerically investigated. The results show that the harmonic signal can be tuned by the structure-control of CQW or enhanced due to propagation effects. If the structure of the CQW is spatial inversion symmetric, a disguised harmonic at the second-order harmonic position is disclosed within the normal odd-order harmonic sequence. However, if the structure of the CQW is adjusted to break the inversion symmetry, the odd-order and even-order harmonics both occur, whose intensities are also influenced by propagation effects.

Graphical abstract

(a) Electric fields, (b) population differences, and (c) harmonic distributions for different well heights of barrier U1 at propagation distance of z = 120 µm.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: The datasets generated in this study are available from the corresponding author, C.J. Zhang, upon reasonable request.]

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Acknowledgements

The work is supported by National Natural Science Foundation of China (Grants Nos. 12174161 and 12074398).

Author information

Authors and Affiliations

  1. School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, 221116, China

    Yi Zhang, Yue Kuang & Chaojin Zhang

  2. Department of Physics, College of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan, 030024, Shanxi, China

    Bin Chen

  3. State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China

    Henglei Du & Chengpu Liu

  4. College of Materials Science and Optoelectronics, University of Chinese Academy of Sciences, Beijing, 100049, China

    Henglei Du & Chengpu Liu

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  1. Yi Zhang
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  2. Yue Kuang
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  3. Chaojin Zhang
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  4. Bin Chen
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  5. Henglei Du
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  6. Chengpu Liu
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All authors contributed equally to the paper.

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Correspondence to Chaojin Zhang.

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Zhang, Y., Kuang, Y., Zhang, C. et al. Tunable enhancement of harmonic radiation in coupled quantum wells. Eur. Phys. J. D 76, 114 (2022). https://doi.org/10.1140/epjd/s10053-022-00443-1

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  • DOI: https://doi.org/10.1140/epjd/s10053-022-00443-1

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