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Title: Intense terahertz emission from relativistic circularly polarized laser pulses interaction with overdense plasmas

During the interaction of a relativistic circularly polarized laser pulse with an overdense plasma target, the longitudinal motion of bunches of electrons under the action of light pressure and electrostatic restore force can emit intense terahertz (THz) pulses. This mechanism allows high pump laser intensity and large electron number participating in the emission. Two-dimensional particle-in-cell simulations are carried out to investigate the THz emission. The results suggest that such a source can produce remarkably intense THz pulses with energy of several mJ/sr and power of tens of gigawatts, which could find applications in nonlinear studies and relativistic laser-plasma interaction diagnostics.
Authors:
;  [1] ;  [2]
  1. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900 (China)
  2. Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 (China)
Publication Date:
OSTI Identifier:
22218560
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 10; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAM BUNCHING; BEAM-PLASMA SYSTEMS; ELECTRONS; EMISSION; LASER-PRODUCED PLASMA; LASERS; LIGHT TRANSMISSION; NONLINEAR PROBLEMS; PLASMA DENSITY; PLASMA DIAGNOSTICS; PLASMA SIMULATION; PULSES; RELATIVISTIC PLASMA; TWO-DIMENSIONAL CALCULATIONS; VISIBLE RADIATION