标题： 窄带太赫兹辐射来自嵌入等离子体密度梯度中的等离子体振荡器 显示英文标题

标题： Narrowband THz Emission from a Plasma Oscillator Imbedded in a Plasma Density Gradient

摘要： 一种新方法用于利用双频激光脉冲相关的拍频波生成辐射，以激发具有密度梯度的等离子体板中的等离子体振荡。 通过共振激发等离子体波，它可以被定位并转换为产生径向极化太赫兹辐射的等离子体振荡器。 粒子-网格模拟和解析理论被用来展示其主要特性，包括窄带宽。 该辐射器应具有有用的应用，例如太赫兹波段的粒子加速器和泵浦-探测实验。 显示英文摘要

摘要： A novel method is presented for generating radiation using the beat wave associated with a bi-frequency laser pulse, to excite plasma oscillations in a plasma slab with a density gradient. By resonantly exciting a plasma wave, it can be localised and transformed into a plasma oscillator that produces a beam of radially polarised terahertz radiation. Particle-in-cell simulations and analytic theory are used to demonstrate its main characteristics, which includes narrow bandwidth. The radiator should have useful applications such as terahertz-band particle accelerators and pump-probe experiments.