Species-Independent Femtosecond Localized Electric Field Measurement
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2017 American Physical Society. 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.
author list (cited authors)
Dogariu, A., Goldberg, B. M., O'Byrne, S., & Miles, R. B.
complete list of authors
Dogariu, Arthur||Goldberg, Benjamin M||O'Byrne, Sean||Miles, Richard B