Intense terahertz generation in two-color laser filamentation: energy scaling with terawatt laser systems
Intense terahertz generation in two-color laser filamentation: energy scaling with terawatt laser systems
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DOI：
10.1088/1367-2630/15/7/075002
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发表时间：
2013-07-03
影响因子：
3.3
通讯作者：
Kim, K. Y.
中科院分区：
文献类型：
--
作者：
Oh, T. I.;You, Y. S.;Kim, K. Y.
我们研究使用太瓦 (TW) 激光器在双色激光成丝中产生高功率太赫兹 (THz)，包括 0.5 TW、1 kHz 系统，以及均在 10 Hz 下运行的 2 和 30 TW 系统。利用这些激光器，我们研究了控制太赫兹输出能量产量和远场辐射分布的丝化宏观效应。我们还表征了从无线电微波到红外频率的广泛频率范围内的辐射光谱。特别是，我们的1 kHz太赫兹源可以通过空气中的双色丝化提供高能量（> 1 mu J）、高平均功率（> 1 mW）、强（> 1MVcm（-1））和宽带（0.01-60 THz）太赫兹辐射。根据我们的缩放定律，类似于 30 TW 的激光器可以在类似于 1.5 m 长的丝状结构中产生 >0.1 mJ 的太赫兹辐射，峰值功率为数吉瓦。
We investigate high-power terahertz (THz) generation in two-color laser filamentation using terawatt (TW) lasers including a 0.5 TW, 1 kHz system, as well as 2 and 30 TW systems both operating at 10 Hz. With these lasers, we study the macroscopic effect in filamentation that governs THz output energy yields and radiation profiles in the far field. We also characterize the radiation spectra at a broad range of frequencies covering radio-micro-waves to infrared frequencies. In particular, our 1 kHz THz source can provide high-energy (>1 mu J), high average power (>1 mW), intense (>1MVcm(-1)) and broadband (0.01-60 THz) THz radiation via two-color filamentation in air. Based on our scaling law, an similar to 30 TW laser can produce >0.1 mJ of THz radiation with multi-gigawatt peak power in similar to 1.5 m long filamentation.