Quasi-phase-matched probe-energy electro-optic sampling as a methodof narrowband terahertz detection

Implementation of free-space quasi-phase-matched electro-optic detection is reported, based on measuring the energy variation of a femtosecond laser pulse induced by a terahertz field. Narrowband probe-energy type of detection is demonstrated using wide-aperture periodically poled Mg : Y : LiNbO 3 c...

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Published in:Applied physics letters 2010-02, Vol.96 (7), p.071106-071106-3
Main Authors: Kitaeva, G. Kh, Kovalev, S. P., Naumova, I. I., Akhmedzhanov, R. A., Ilyakov, I. E., Shishkin, B. V., Suvorov, E. V.
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Summary:Implementation of free-space quasi-phase-matched electro-optic detection is reported, based on measuring the energy variation of a femtosecond laser pulse induced by a terahertz field. Narrowband probe-energy type of detection is demonstrated using wide-aperture periodically poled Mg : Y : LiNbO 3 crystals with as-grown domain gratings. Spectra of air plasma generation measured by this method are compared with the spectrum measured by the conventional ZnTe-based probe-phase ellipsometry scheme. Besides, the conventional method was performed for both types of sources, for the air plasma generation, and for the quasi-phase-matched optical rectification in the same periodically poled Mg : Y : LiNbO 3 crystals.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3309688