Abstract
Although the linear optical properties {χ1(ω)} of semiconductors are well understood theoretically, the nonlinear optical properties {χ2(2ω,ω,ω)} are more poorly understood, with an order of magnitude typically separating theoretical and experimental results. Because optical properties reflect both the band structure and momentum matrix elements, it is clear that nonlinear optics provides a more rigorous test of models of the optical properties of semiconductors.
© 1987 Optical Society of America
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