Iris-assisted terahertz field-induced second-harmonic generation in air

Amit Beer, Dror Hershkovitz, Sharly Fleischer*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Terahertz field-induced second-harmonic generation (TFISH) is a technique for optical detection of broadband THz fields. We show that by placing an iris at the interaction volume of the THz and optical fields, the TFISH signal increases by several tenfold 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.

Original languageEnglish
Pages (from-to)5190-5193
Number of pages4
JournalOptics Letters
Issue number21
StatePublished - 2019


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