Current-induced break of inversion symmetry in Si: optical second-harmonic generation induced by a dc current
O. A. Aktsipetrov, V. O. Bessonov, A. A. Fedyanin, A. I. Maidykovsky
Abstract
The dc-current-induced optical second-harmonic generation is observed at the surface of centrosymmetric single crystal of Si. Surface dc-current with density up to jmax 103 A/cm2 results in break of inversion symmetry of Si and induces optical second-harmonic generation with intensity that corresponds to the appearance of dipole second-order susceptibility χ(2)d(jmax) 3 · 10-15m/V.
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