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arXiv · 2209.01153

Optical Rectification and Electro-Optic Sampling in Quartz

Vasileios Balos·Martin Wolf·Sergey Kovalev·Mohsen Sajadi
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Abstract

We report electro-optic sampling (EOS) response and terahertz (THz) optical rectification (OR) in z-cut alpha-quartz. Due to its small effective second-order nonlinearity, echo-free waveform of intense THz pulses with a few MV/cm electric-field strength can be measured faithfully with no saturation effect. Both its OR and EOS responses are broad with extension up to ~8 THz. Strikingly, the latter responses are independent of the crystal thickness, a plausible indication of strong surface contribution to the total second-order nonlinear susceptibility of quartz. Our study introduces thin quartz plates as the reliable THz electro-optic medium for echo-free, high field THz detection.

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Vasileios Balos, Martin Wolf, Sergey Kovalev, Mohsen Sajadi. 2022-09-02. Optical Rectification and Electro-Optic Sampling in Quartz. https://doi.org/10.1364/oe.480339

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