Emission of Electromagnetic Pulses from Laser Wakefields through Linear Mode Conversion

Zheng-Ming Sheng, Kunioki Mima, Jie Zhang, and Heiji Sanuki
Phys. Rev. Lett. 94, 095003 – Published 9 March 2005

Abstract

Powerful coherent emission around the plasma oscillation frequency can be produced from a laser wakefield through 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 are obtained analytically, which are in agreement with particle-in-cell simulations. The emission can be tuned to be a radiation source in the terahertz region and with field strengths as large as a few GV/m, suitable for high-field applications. The emission also provides a simple way to measure the wakefield produced for particle acceleration.

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  • Received 26 August 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.095003

©2005 American Physical Society

Authors & Affiliations

Zheng-Ming Sheng1,2, Kunioki Mima2, Jie Zhang1, and Heiji Sanuki3

  • 1Laboratory of Optical Physics, Institute of Physics, CAS, Beijing 100080, China
  • 2Institute of Laser Engineering, Osaka University, Suita, Osaka 565-0871, Japan
  • 3National Institute for Fusion Science, Toki, Gifu 509-5292, Japan

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Issue

Vol. 94, Iss. 9 — 11 March 2005

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