Powerful terahertz emission from laser wake fields excited in inhomogeneous plasmas
文献类型：期刊论文
| 作者 | Sheng, ZM ; Mima, K ; Zhang, J |
| 刊名 | PHYSICS OF PLASMAS
 |
| 出版日期 | 2005 |
| 卷号 | 12期号:12 |
| 关键词 | WAVE-BREAKING ELECTRON-PLASMA RELATIVISTIC ELECTRONS RESONANT ABSORPTION RADIATION ACCELERATOR PULSES WAKEFIELD AMPLITUDE BEAMS |
| ISSN号 | 1070-664X |
| 通讯作者 | Sheng, ZM (reprint author), Chinese Acad Sci, Inst Phys, Lab Opt Phys, Beijing 100080, Peoples R China. |
| 中文摘要 | Powerful coherent emission of broadband few-terahertz radiation can be produced from a laser wake field by linear mode conversion. This occurs when the laser pulse is incident obliquely to the density gradient of inhomogeneous plasmas. The emission spectrum and conversion efficiency predicted by mode conversion theory are in agreement with particle-in-cell simulations. The energy conversion efficiency from laser pulses to this low-frequency emission scales proportional to their frequency ratio by (omega/omega(0))(3) and increases with the laser intensity and the plasma density scale length. By adjusting the laser pulse duration and plasma density profiles, one can control the emission frequency, bandwidth, and duration. In two- and three-dimensional geometry, conical wake emission is found in the backward direction when the laser pulse propagates along the density gradient. This can be explained well by the linear mode conversion. To avoid conical emission, a laser pulse incident obliquely to the density gradient can be deployed so that collimated emission becomes dominant in the '' specular reflection '' direction, suitable for practical applications. (c) 2005 American Institute of Physics. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51198]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Sheng, ZM,Mima, K,Zhang, J. Powerful terahertz emission from laser wake fields excited in inhomogeneous plasmas[J]. PHYSICS OF PLASMAS,2005,12(12). |
| APA | Sheng, ZM,Mima, K,&Zhang, J.(2005).Powerful terahertz emission from laser wake fields excited in inhomogeneous plasmas.PHYSICS OF PLASMAS,12(12). |
| MLA | Sheng, ZM,et al."Powerful terahertz emission from laser wake fields excited in inhomogeneous plasmas".PHYSICS OF PLASMAS 12.12(2005). |
入库方式： OAI收割
来源：物理研究所
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