光学学报, 2020, 40 (10): 1030001, 网络出版: 2020-04-28
线状电极作用下等离子体产生太赫兹波的研究 下载: 857次
Terahertz Waves Generated Through Plasma Under Linear Electrodes
摘要
将线状电极置于飞秒激光聚焦点处,使激光电离空气产生的等离子体处于线状电极产生的偏置直流电场中,观察等离子体辐射太赫兹波的特性。通过扫描电极并观察太赫兹波强度,得到了增强太赫兹波幅值的最佳位置,并且发现随着激光功率的增大,最佳位置沿光传播方向移动。该研究不仅探讨了线状电极调制下等离子体产生太赫兹波的特征,还揭示了等离子体的物理特性。
Abstract
By placing a pair of linear electrodes at the focal point of a femtosecond laser, the plasma generated through the laser-ionized air is placed in the bias direct-current (DC) field generated by the linear electrode. We observe the terahertz characteristics of plasma in the bias-electric field in this case. By scanning the linear electrodes and observing the terahertz wave intensity, we obtain the optimal electrode position for enhancing the amplitude of terahertz wave. Results suggest that as the laser power increases, the optimal position moves in the direction of light propagation. This work not only studies the characteristics of terahertz signal generated through plasma under the modulation of linear electrodes, but also reveals the physical characteristics of plasma.
冯世嘉, 董立泉, 马丹妮, 吴同, 张亮亮, 赵跃进. 线状电极作用下等离子体产生太赫兹波的研究[J]. 光学学报, 2020, 40(10): 1030001. Shijia Feng, Liquan Dong, Danni Ma, Tong Wu, Liangliang Zhang, Yuejin Zhao. Terahertz Waves Generated Through Plasma Under Linear Electrodes[J]. Acta Optica Sinica, 2020, 40(10): 1030001.