| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Modifying the Electron Dynamics in High-Order Harmonic Generation via a Two-Color Laser Field |
| Cai-Ping Zhang1,2 and Xiang-Yang Miao1,2* |
1College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
2Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, Shanxi Normal University, Taiyuan 030031, China
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| Cite this article: |
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Cai-Ping Zhang and Xiang-Yang Miao 2023 Chin. Phys. Lett. 40 124201 |
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Abstract We investigate the harmonic emission from bichromatic periodic potential by numerically solving the time-dependent Schrödinger equation in the velocity gauge. The results show that the harmonic minimum is sensitive to the wavelength. Moreover, distinct crystal momentum states contribute differently to harmonic generation. In momentum space, the electron dynamics reveal a close relationship between the spectral minimum and the electron distribution in higher conduction bands. Additionally, by introducing an ultraviolet pulse to the fundamental laser field, the suppression of the harmonic minimum occurs as a result of heightened electron populations in higher conduction bands. This work sheds light on the harmonic emission originating from a solid with a two-atom basis.
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Received: 16 July 2023
Published: 27 November 2023
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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