Femtosecond carrier-induced screening of dc electric-field-induced second-harmonic generation at the Si(001)–SiO_2 interface

Abstract
Carrier-induced screening of the dc electric field at the Si(001)–SiO2 interface is observed by intensity-dependent and femtosecond-time-resolved second-harmonic spectroscopy. The screening occurs on a time scale of ωp-1, the reciprocal plasma frequency of the generated carriers.