利用两个不同频率的激光脉冲在等离子体中实现快速高效的光子减速

IF 4.8 1区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Y. X. Wang, X. L. Zhu, S. M. Weng, P. Li, X. F. Li, H. Ai, H. R. Pan, Z. M. Sheng
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引用次数: 0

摘要

在中红外(mid-IR)到太赫兹(THz)范围内产生超短大功率光源是许多领域(从基础研究到生物学和医学)的应用兴趣所在。除了传统的激光技术外,等离子体湍流中的光子减速也为产生超短中红外或太赫兹脉冲提供了另一种方法。在这里,我们提出了一种光子减速方案,通过使用波长相对较短的强驱动激光脉冲和波长相对较长的信号激光脉冲,高效生成超短中红外或太赫兹脉冲。信号脉冲以适当的时间延迟跟踪驱动脉冲,使其位于由驱动脉冲驱动的第二个唤醒泡的前端。由于波长相对较长,信号脉冲在等离子体唤醒泡中会受到较大的折射率梯度影响。因此,对于波长较长的信号脉冲,等离子体唤醒泡中的光子减速会变得更快、更有效。这大大提高了在长波长红外和太赫兹光谱范围内产生超短大功率光源时光子减速的能力和效率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Fast efficient photon deceleration in plasmas by using two laser pulses at different frequencies
The generation of ultrashort high-power light sources in the mid-infrared (mid-IR) to terahertz (THz) range is of interest for applications in a number of fields, from fundamental research to biology and medicine. Besides conventional laser technology, photon deceleration in plasma wakes provides an alternative approach to the generation of ultrashort mid-IR or THz pulses. Here, we present a photon deceleration scheme for the efficient generation of ultrashort mid-IR or THz pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long wavelength. The signal pulse trails the driver pulse with an appropriate time delay such that it sits at the front of the second wake bubble that is driven by the driver pulse. Owing to its relatively long wavelength, the signal pulse will be subjected to a large gradient of the refractive index in the plasma wake bubble. Consequently, the photon deceleration in the plasma wake becomes faster and more efficient for signal pulses with longer wavelengths. This greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength IR and THz spectral ranges.
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来源期刊
Matter and Radiation at Extremes
Matter and Radiation at Extremes Physics and Astronomy-Atomic and Molecular Physics, and Optics
CiteScore
8.60
自引率
9.80%
发文量
160
审稿时长
15 weeks
期刊介绍: Matter and Radiation at Extremes (MRE), is committed to the publication of original and impactful research and review papers that address extreme states of matter and radiation, and the associated science and technology that are employed to produce and diagnose these conditions in the laboratory. Drivers, targets and diagnostics are included along with related numerical simulation and computational methods. It aims to provide a peer-reviewed platform for the international physics community and promote worldwide dissemination of the latest and impactful research in related fields.
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