Interaction of an electromagnetic wave with a rapidly created spatially periodic plasma

Spencer Kuo, James Faith

Research output: Contribution to journalArticle

Abstract

The interaction of electromagnetic waves with rapidly created time-varying spatially periodic plasmas is studied. The numerical results of the collisionless case show that both frequency upshifted and frequency downshifted waves are generated. Moreover, the frequency downshifted waves are trapped by the plasma when the plasma frequency is larger than the wave frequency. The trapping has the effect of dramatically enhancing the efficiency of the frequency downshift conversion process, by accumulating incident wave energy during the plasma transition period. A theory based on the wave impedance of each Floquet mode of the periodic structure is formulated, incorporating with the collisional damping of the plasma. Such a theory explains the recent experimental observations [Faith, Kuo, and Huang, Phys. Rev. E 55, 1843 (1997)] where the frequency downshifted signals were detected repetitively with considerably enhanced spectral intensities while the frequency upshifted signals were missing.

Original languageEnglish (US)
Pages (from-to)2143-2150
Number of pages8
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume56
Issue number2
StatePublished - Aug 1997

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Electromagnetic Wave
electromagnetic radiation
Plasma
Interaction
interactions
Frequency Conversion
frequency converters
plasma frequencies
Periodic Structures
Trapping
Impedance
damping
trapping
impedance
Time-varying
Damping
Numerical Results
Energy

ASJC Scopus subject areas

  • Mathematical Physics
  • Physics and Astronomy(all)
  • Condensed Matter Physics
  • Statistical and Nonlinear Physics

Cite this

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