基于激光尾场的超短超强中红外脉冲产生及应用

Generation and applications of ultra-short and ultra-intense mid-infrared pulses from laser wakefields

  • 摘要: 超短超强中红外激光脉冲在强场物理、超快化学、环境监测、生物医疗等领域有独特应用价值,尤其在强场物理研究领域中,超短超强中红外光为开拓超强激光与物质相互作用的新物理提供了不同于以往近红外波段的波长新尺度。然而受限于传统激光晶体及非线性晶体损伤阈值,长期以来产生大能量近单周期中红外光源始终是超快激光技术领域的重要挑战。近年来,利用等离子体作为非线性光学介质,基于激光尾场的等离子体光子减速过程产生超短超强中红外脉冲成为激光等离子体领域的研究新方向。本文围绕等离子体光子减速这一物理机制,系统介绍其基本原理、数值模拟及实验研究进展以及未来的应用前景。

     

    Abstract: Ultra-short and ultra-intense mid-infrared laser pulses hold unique application in fields such as strong-field physics, ultrafast chemistry, environmental monitoring, and biomedicine biomedical applications. Particularly in strong-field physics research, ultra-short and ultra-intense mid-infrared pulses provide a new wavelength scale distinct from the conventional near-infrared range, enabling the exploration of novel physics in the interaction between ultra-intense lasers and matter. However, due to the damage thresholds of traditional laser crystals and nonlinear crystals, the generation of high-energy, single-cycle mid-infrared light sources has long been a significant challenge in ultrafast laser technology. In recent years, utilizing plasma as a nonlinear optical medium, the generation of ultra-short and ultra-intense mid-infrared pulses through photon deceleration process based on laser wakes has emerged as a new research direction in laser-plasma physics. This paper systematically reviews the fundamental principles, numerical simulations, experimental progress, and future application prospects surrounding this physical mechanism of plasma photon deceleration.

     

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