激光与光电子学进展, 2024, 61 (5): 0500001, 网络出版: 2024-03-13  

从超强超短激光的脉冲前沿畸变到X形光波包的群速度控制封面文章

From Pulse-Front Distortions of Ultra-Intense Ultrashort Lasers to Group-Velocity Controls of X-Shape Optical Wave-Packets
李朝阳 1,2,*冷雨欣 2李儒新 1,2,3
作者单位
1 张江实验室,上海 201210
2 中国科学院上海光学精密机械研究所强场激光物理国家重点实验室,上海 201800
3 上海科技大学,上海 201210
摘要
超强超短激光在空间上具有大口径、在时间上具有短脉冲,因此极易产生时空耦合效应,例如脉冲前沿畸变,使得脉冲前沿和相位前沿发生时空分离,通常表现为脉冲前沿倾斜或弯曲,不利于获得预期的高聚焦光强。但当这种脉冲前沿畸变(控制)用于产生X形光波包时,却增加了一维全新的自由度,实现了光波包群速度和群加速度的自由控制,可获得超光速、亚光速、加速、减速,甚至动态可控的群速度。通过综述脉冲前沿畸变(控制)在超强超短激光中的不良影响和在X形光波包中的特殊效果,旨在为同一光学现象在不同研究方向间的交叉应用提供些许思考。
Abstract
Because ultra-intense ultra-short laser has a large beam in space and a short pulse in time, the spatiotemporal coupling effect, for example the pulse-front distortion, frequently appears, which leads to a separation between the pulse-front and the phase-front in space-time, such as the pulse-front tilt or curvature, and is not conducive to obtaining the expected high focused intensity. However, when this pulse-front distortion (control) is applied in the X-shape optical wave-packet, a new degree of freedom is introduced for freely controlling the group-velocity and the group-acceleration of the optical wave-packet, enabling superluminal, subluminal, accelerating, decelerating, and even dynamically-controllable group velocities. By reviewing the pulse-front distortion (control)'s adverse effects in the ultra-intense ultra-short lasers and its special performances in the X-shape optical wave-packets, we try to provide some reflections on the cross-application of the same optical phenomenon in different research directions.

李朝阳, 冷雨欣, 李儒新. 从超强超短激光的脉冲前沿畸变到X形光波包的群速度控制[J]. 激光与光电子学进展, 2024, 61(5): 0500001. Zhaoyang Li, Yuxin Leng, Ruxin Li. From Pulse-Front Distortions of Ultra-Intense Ultrashort Lasers to Group-Velocity Controls of X-Shape Optical Wave-Packets[J]. Laser & Optoelectronics Progress, 2024, 61(5): 0500001.

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