Jana Kamalesh, Mi Yonghao, Møller Søren H, Ko Dong Hyuk, Gholam-Mirzaei Shima, Abdollahpour Daryoush, Sederberg Shawn, Corkum Paul B
Joint Attosecond Science Laboratory, University of Ottawa and National Research Council Canada, 25 Templeton Street, Ottawa, ON K1N 6N5, Canada.
Department of Physics, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.
Sci Adv. 2024 Jan 12;10(2):eadl1803. doi: 10.1126/sciadv.adl1803. Epub 2024 Jan 10.
The ability to manipulate the multiple properties of light diversifies light-matter interaction and light-driven applications. Here, using quantum control, we introduce an approach that enables the amplitude, sign, and even configuration of the generated light fields to be manipulated in an all-optical manner. Following this approach, we demonstrate the generation of "flying doughnut" terahertz (THz) pulses. We show that the single-cycle THz pulse radiated from the dynamic ring current has an electric field structure that is azimuthally polarized and that the space- and time-resolved magnetic field has a strong, isolated longitudinal component. We apply the flying doughnut pulse for a spectroscopic measurement of the water vapor in ambient air. Pulses such as these will serve as unique probes for spectroscopy, imaging, telecommunications, and magnetic materials.
操控光的多种属性的能力使光与物质的相互作用以及光驱动应用变得多样化。在此，我们利用量子控制引入一种方法，能够以全光方式操控所产生光场的振幅、符号乃至构型。遵循此方法，我们展示了“飞行甜甜圈”太赫兹（THz）脉冲的产生。我们表明，从动态环形电流辐射出的单周期太赫兹脉冲具有方位角偏振的电场结构，且空间和时间分辨的磁场具有强的、孤立的纵向分量。我们将“飞行甜甜圈”脉冲应用于对环境空气中水蒸气的光谱测量。这样的脉冲将作为光谱学、成像、电信和磁性材料的独特探针。
