首页> 外文OA文献 >Elementary electronic excitation in three-dimensional electron gases under free-electron laser radiations
【2h】

Elementary electronic excitation in three-dimensional electron gases under free-electron laser radiations

机译:自由电子激光辐射下三维电子气中的基本电子激发

摘要

I present a detailed theoretical study of the collective excitation associated with plasmon modes in threedimensional electron gases 3DEG’s, subject to free-electron laser FEL radiations. Using the exact solution of the time-dependent Schro¨dinger equation in which the effect of the electromagnetic e.m. radiation field is included in the Coulomb gauge, I have derived the Green’s function, the density of states DOS, and the density-density correlation function for free electrons in (K,t) and K, representation. With these results, the influence of the FEL radiations on plasmon spectrum in a 3DEG has been studied by employing the randomphase approximation. It has been found that the presence of the linearly polarized terahertz laser fields will lead to a strong modulation of the electron DOS and of the Fermi energy in a 3DEG structure. As a consequence, the plasmon spectrum in an electron gas can be tuned by varying the intensity and/or frequency of the e.m. radiation. A number of important and distinctive effects induced by the FEL radiations are presented and discussed.
机译:我对自由电子激光FEL辐射下三维电子气体3DEG中与等离激元模式相关的集体激发进行了详细的理论研究。使用与时间有关的Schro¨dinger方程的精确解,其中电磁场效应辐射场包含在库仑量规中,我导出了格林函数,状态DOS的密度以及自由电子在(K,t)和K,表示中的密度-密度相关函数。利用这些结果,已经通过采用随机相位近似研究了FEL辐射对3DEG中的等离激元光谱的影响。已经发现,线性偏振太赫兹激光场的存在将导致3DEG结构中电子DOS和费米能量的强烈调制。结果,可以通过改变e.m的强度和/或频率来调谐电子气中的等离子体光谱。辐射。提出并讨论了由FEL辐射引起的许多重要而独特的影响。

著录项

  • 作者

    Xu W.;

  • 作者单位
  • 年度 1998
  • 总页数
  • 原文格式 PDF
  • 正文语种
  • 中图分类

相似文献

  • 外文文献
  • 中文文献
  • 专利

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号