https://doi.org/10.1140/epjd/s10053-022-00443-1
Regular Article – Nonlinear Dynamics
Tunable enhancement of harmonic radiation in coupled quantum wells
1
School of Physics and Electronic Engineering, Jiangsu Normal University, 221116, Xuzhou, China
2
Department of Physics, College of Physics and Optoelectronics, Taiyuan University of Technology, 030024, Taiyuan, Shanxi, China
3
State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, 201800, Shanghai, China
4
College of Materials Science and Optoelectronics, University of Chinese Academy of Sciences, 100049, Beijing, China
Received:
17
April
2022
Accepted:
21
June
2022
Published online:
5
July
2022
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.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022
