MINIMIZATION OF DOPANT-INDUCED RANDOM POTENTIAL FLUCTUATIONS IN SAWTOOTH DOPING SUPERLATTICES.
01 January 1988
Potential fluctuations due to random dopant distribution are estimated in a doping superlattice for different doping profiles. It is shown that statistical potential fluctuations are minimized by employing a doping profiles consisting of a train of delta- functions, which result in sawtooth-shaped band edges. Clearly resolved quantum-confined optical absorption and luminescence transitions are observed in this improved doping superlattice structure. The sawtooth superlattice provides the basic for a novel GaAs-technology which is suited to operate in the minimum dispersion region of silica fibers at a wavelength of lambda = 1.3microns.