Suppression of coherent interference to electric-field-induced second-harmonic (E-FISH) signals for the measurement of electric field in mesoscale confined geometries

Madeline Vorenkamp, Scott A. Steinmetz, Timothy Y. Chen, Yiguang Ju, Christopher J. Kliewer

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We present spatially enhanced electric-field-induced second-harmonic (SEEFISH) generation with a chirped femtosecond beam for measurements of electric field in mesoscale confined geometries subject to destructive spurious second-harmonic generation (SHG). Spurious SHG is shown to interfere with the measured E-FISH signal coherently, and thus simple background subtraction is not sufficient for single-beam E-FISH approaches, especially in a confined system with a large surface-to-volume ratio. The results show that a chirped femtosecond beam is effective in preventing higher-order mixing and white light generation in windows near the beam focal point which further contaminates the SEEFISH signal. The successful measurements of electric field of a nanosecond dielectric barrier discharge in a test cell demonstrated that spurious SHG detected with a congruent traditional E-FISH approach can be eliminated using the SEEFISH approach.

Original languageEnglish (US)
Pages (from-to)1930-1933
Number of pages4
JournalOptics Letters
Volume48
Issue number7
DOIs
StatePublished - Apr 1 2023

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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