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  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CC_P_2

Large spectral broadening by cross-phase modulation with intense THz field

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Abstract

Intense THz fields are a new powerful tool to study linear and nonlinear response of the matter. We present nonlinear cross-phase modulation (XPM) in electro-optic crystals using intense, single-cycle terahertz (THz) radiation. THz pulses with energy up to 50 μJ and spectral contents in the frequency range between 0.1 and 5 THz are realized by optical rectification in organic crystal DSTMS. The THz radiation can be focused to diffraction-limited waist for the realization of field strength up to 10 MV/cm. The time-dependent evolution of the THz electric field induces nonlinear XPM in 50 μm thick gallium phosphate crystal leading to significant spectral broadening and shifting of the co-propagating 60 fs, 800 nm probe pulse.

© 2015 IEEE

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