Abstract
In this paper, the kinetic properties of single electron and the spatial radiation in tightly focused linearly polarized intense laser fields with different carrier envelope phase under long and short pulse conditions are investigated. The full-space radiation energy distribution, the full-angle optical spectrum of forward radiation, and the full-angle pulse time spectrum of forward radiation are explored in all directions in three dimensions. The study found that the spatial distribution of high-energy electron radiation is no longer fourfold symmetric in a tightly focused pulse intense laser field, and the energy asymmetry coefficient and maximum energy angle are proposed for the first time to quantify them. In addition, it was found that in laser fields with different pulse durations, the electron radiation optical spectra and the radiation pulse time spectral angular distribution exhibit different characteristics. The manifestation and the degree of change affected by the carrier envelope phase are also different. The intensity and angular range of the electron spectra and pulse time spectra in the long and short pulse laser fields were compared, and the ‘Dark Angle’ phenomenon of the forward radiation optical spectrum, along with the interference superposition of the radiation pulse pair, was found.
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Acknowledgements
This work has been supported by the National Natural Sciences Foundation of China under Grant No. 10947170/A05 and No. 11104291, Natural science fund for colleges and universities in Jiangsu Province under Grant No. 10KJB140006, Natural Sciences Foundation of Shanghai under Grant No. 11ZR1441300 and colleges and universities in Jiangsu Province under Grant No. 10KJB140006, and Natural Science Foundation of Nan**g University of Posts and Telecommunications under Grant No. NY221098 and sponsored by Jiangsu Qing Lan Project and STITP Project under Grant No. XYB2013012.
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Wang, Y., Yang, Q., Chang, Y. et al. Effect of carrier envelope phase on the characteristics of electron radiation in a linearly polarized tightly focused pulsed laser field. Indian J Phys 98, 2529–2537 (2024). https://doi.org/10.1007/s12648-023-02992-6
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DOI: https://doi.org/10.1007/s12648-023-02992-6