Ultrashort Tilted-Pulse-Front Pulses and Nonparaxial Tilted-Phase-Front Beams,ACS Photonics

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Ultrashort Tilted-Pulse-Front Pulses and Nonparaxial Tilted-Phase-Front Beams
ACS Photonics ( IF 6.5 ) Pub Date : 2017-09-06 00:00:00 , DOI: 10.1021/acsphotonics.7b00464
Liang Jie Wong ₁ , Ido Kaminer _{2,

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Affiliation

Electromagnetic pulses with tilted pulse fronts are instrumental in enhancing the efficiency of many light–matter interaction processes, with prominent examples including terahertz generation by optical rectification, dielectric laser acceleration, ultrafast electron imaging, and X-ray generation from free electron lasers. Here, we find closed-form expressions for tilted-pulse-front pulses that capture their exact propagation dynamics even in deeply nonparaxial and sub-single-cycle regimes. By studying the zero-bandwidth counterparts of these pulses, we further obtain classes of nondiffracting wavepackets whose phase fronts are tilted with respect to the direction of travel of the intensity peak. The intensity profiles of these nonparaxial nondiffracting wavepackets move at a constant velocity that can be much greater than or much less than the speed of light, and can even travel backward relative to the direction of phase front propagation.

中文翻译：

超短倾斜脉冲前脉冲和非傍轴倾斜相位前光束

具有倾斜脉冲前沿的电磁脉冲有助于提高许多光-质相互作用过程的效率，其中突出的例子包括通过光整流产生太赫兹，电介质激光加速，超快电子成像以及从自由电子激光产生X射线。在这里，我们找到了倾斜脉冲前脉冲的闭式表达式，即使在深度非傍轴和亚单周期状态下也能捕获其精确的传播动力学。通过研究这些脉冲的零带宽对应物，我们进一步获得其相位前沿相对于强度峰值的传播方向倾斜的非衍射波包类。

更新日期：2017-09-07

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