150 citations · 376 across the 4 of their papers we have counts for
4 papers
Collective oscillations driven by correlation in the nonlinear optical regime
Th. Oestreich, L. J. Sham
We present an analytical and numerical study of the coherent exciton polarization including exciton-exciton correlation. The time evolution after excitation with ultrashort optical…
Theory of exciton-exciton correlation in nonlinear optical response
Th. Oestreich, K. Schoenhammer, L. J. Sham
We present a systematic theory of Coulomb interaction effects in the nonlinear optical processes in semiconductors using a perturbation series in the exciting laser field. The thir…
Theory of Electronic Ferroelectricity
T. Portengen, Th. Ostreich, L. J. Sham
We present a theory of the linear and nonlinear optical characteristics of the insulating phase of the Falicov-Kimball model within the self-consistent mean-field approximation. Th…
Linear and nonlinear optical characteristics of the Falicov-Kimball model
T. Portengen, Th. Ostreich, L. J. Sham
We calculate the linear and nonlinear optical properties of the Falicov-Kimball model for a mixed-valent system within the self-consistent mean-field approximation. Second-harmonic…