通过相控双色激光脉冲与低密度的等离子体相互作用来产生增强的太赫兹辐射
K P Anjana1,2, Rohit Kumar Srivastav1, Mrityunjay Kundu3,4
1Institute for Plasma Research, Bhat, Gandhinagar, 382428, India.
Scientific reports
|February 13, 2026
概括
双色混合频激光脉冲显著增强了在等离子体接口的太赫兹 (THz) 辐射生成. 这种新的方法提供了可调节的THz强度和扩展,优于单频脉冲的性能.
科学领域:
- 等离子体物理学的物理学
- 激光与等离子体相互作用
- 太赫兹 (THz) 科学和技术
背景情况:
- 太赫兹 (THz) 辐射产生对于各种科学和技术应用至关重要.
- 使用单频激光脉冲的传统方法在THz输出强度和可调性方面存在局限性.
- 在真空-等离子体接口上激光驱动的THz生成是一个关键的研究领域.
研究的目的:
- 通过使用双色混合频激光脉冲 (M脉冲) 来研究THz辐射生成的增强.
- 探索M脉冲中相位不对称的作用,以优化THz发射.
- 为了比较M脉冲的THz性能与单频双极脉冲 (B脉冲).
主要方法:
- 根据M-脉冲相不对称性,推算动力 (PF) 的新表达式的推导.
- 在低密度等离子体上,s-极化激光脉冲的斜率发生所驱动的THz辐射生成的分析建模.
- 使用有限尺寸等离子体上的粒子在细胞 (PIC) 模拟来验证分析结果.
主要成果:
- 与能量相同的B脉冲相比,M脉冲可以产生显著增强的PF,从而导致更高的THz产量.
- 在M脉冲中相位不对称性打破了周期对周期的对称性,从而实现了高效的THz发射.
- THz强度和宽度可以通过控制的M脉冲元件的振幅和相位来调整.
结论:
- 双色混合频激光脉冲为优化THz源设计提供了一个有前途的途径.
- M-脉冲配置为THz辐射提供了可相控和高效的驱动器.
- 使用M脉冲量身定制的激光-等离子相互作用可以带来卓越的THz生成性能.
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