Monday, February 27, 2017

Abstract-Terahertz modulation induced by filament interaction

Boqu He, Junyi Nan, Min Li, Shuai Yuan, and Heping Zeng

We experimentally demonstrated that nonlinear filament interaction could spectrally modulate terahertz (THz) radiation generated from asymmetric two-color filaments. It was the spatial plasma density modulation in plasma channels that induced the THz spectral modulation. As a result of optical manipulation of electron density in the filamentary plasma gratings, the proportion of high-frequency THz spectra increased, while that of low-frequency THz spectra decreased, indicating that the increase of free electron density in the filamentary plasma grating brought about THz frequency upshifts.
© 2017 Optical Society of America
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