4.8 Article

Direct Measurement of the Electron Density of Extended Femtosecond Laser Pulse-Induced Filaments

Journal

PHYSICAL REVIEW LETTERS
Volume 105, Issue 21, Pages -

Publisher

AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.215005

Keywords

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Funding

  1. Office of Naval Research
  2. National Science Foundation
  3. U.S. Department of Energy
  4. Lockheed-Martin Corporation
  5. Direct For Mathematical & Physical Scien
  6. Division Of Physics [0904302] Funding Source: National Science Foundation
  7. Division Of Physics
  8. Direct For Mathematical & Physical Scien [0934856] Funding Source: National Science Foundation

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We present direct time- and space-resolved measurements of the electron density of femtosecond laser pulse-induced plasma filaments. The dominant nonlinearity responsible for extended atmospheric filaments is shown to be field-induced rotation of air molecules.

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