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arXiv · 1906.10208

Iris-assisted Terahertz Field-Induced Second Harmonic Generation in Air

Amit Beer·Dror Hershkovitz·Sharly Fleischer
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Abstract

Terahertz field-induced second harmonic generation (TFISH) is a technique for optical detection of broad-band THz fields. We show that by placing an iris at the interaction volume of the THz and optical fields, the TFISH signal increases by few ten-fold in atmospheric air. The iris-assisted TFISH amplification is characterized at varying air pressures and probe intensities and provides an elegant platform for studying nonlinear phase-matching in the gas phase.

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Amit Beer, Dror Hershkovitz, Sharly Fleischer. 2019-06-24. Iris-assisted Terahertz Field-Induced Second Harmonic Generation in Air. https://doi.org/10.1364/ol.44.005190

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