Abstract

Among all the nonlinear optical properties of semiconductors, two-photon absorption (TPA) and its associated nonlinear index of refraction n₂ have always attracted substantia) interest.^1,2 Recent development, of two-dimensional quantum-well (QW) and one-dimensional quantum-wire (QWr) systems have prompted theoretical^3,4 and experimental studies of TPA in those structures,⁵ The theoretical papers^3,4 are mostly concerned with the computer evaluation of TPA for the specific QW systems, while not devoting enough attention to the TPA dependence on such parameters as material composition and size. Also, no detailed comparison of the TPA in one-, two-, and three-dimensional systems has been made.

© 1993 Optical Society of America