Species-Independent Femtosecond Localized Electric Field Measurement

Arthur Dogariu, Benjamin M. Goldberg, Sean O'Byrne, Richard B. Miles

Research output: Contribution to journalArticlepeer-review

99 Scopus citations


We present an optical measurement method using a femtosecond laser for nonintrusive measurements of electric field strength and orientation in virtually any gas or gas mixture via second-harmonic generation. This simple method takes advantage of the asymmetry in polarizability induced by an applied electric field, which enables the otherwise forbidden second-harmonic generation in any centrosymmetric or homogeneous media. The use of a femtosecond laser source permits high intensities without avalanche breakdown and leads to the measurement of electric field strength down to approximately 100 V/cm in air with submillimeter spatial resolution governed by the confocal parameter and femtosecond temporal resolution governed by the laser-pulse duration.

Original languageEnglish (US)
Article number024024
JournalPhysical Review Applied
Issue number2
StatePublished - Feb 23 2017

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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