Abstract

In the past, the few existing calculations of the nonlinear optical coefficents in solids which employed band structure techniques have been almost exclusively restricted to the zero-frequency limit.^1,2 Calculations of the dispersive behavior have been based on either a simplified two-level band structure (effectively a molecular orbital approach) or an empirical model of the critical points in the Brillouin zone.³

© 1986 Optical Society of America