Phys. Rev. E 77, 046405 (2008) [6 pages]Single-cycle powerful megawatt to gigawatt terahertz pulse radiated from a wavelength-scale plasma oscillatorReceived 12 November 2007; revised 12 February 2008; published 15 April 2008 We propose a scheme to generate single-cycle powerful terahertz (THz) pulses by ultrashort intense laser pulses obliquely incident on an underdense plasma slab of a few THz wavelengths in thickness. THz waves are radiated from a transient net current driven by the laser ponderomotive force in the plasma slab. Analysis and particle-in-cell simulations show that such a THz source is capable of providing power of megawatts to gigawatts, field strength of MV/cm–GV/cm, and broad tunability range, which is potentially useful for nonlinear and high-field THz science and applications. © 2008 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.77.046405
DOI:
10.1103/PhysRevE.77.046405
PACS:
52.25.Os, 42.65.Re, 42.72.Ai, 52.59.Ye
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