G. Sharma, H. Hafez, I. Al-Naib, R. Morandotti, T. Ozaki
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Effects of the carrier density on the THz-induced nonlinearity in photoexcited GaAs
We investigate the effects of electron carrier density on the nonlinear response of photoexcited GaAs, illuminated by intense terahertz fields. We use the optical-pump/THz-probe technique, and explain our experimental results with an intervalley-scattering-based model.
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