Data are presented on the Fermi level influence on interdiffusion in self-o
rganized quantum dots. Modulation doping is used to place either electrons
or holes in the quantum dots' zero-dimensional levels. The ground state emi
ssion energy and discrete level energy separations show that p-type modulat
ion doping enhances the interdiffusion of the quantum dot material with its
surrounding barriers, while n-type doping inhibits the interdiffusion. The
results are consistent with the interdiffusion proceeding through intersti
tial crystal defects. (C) 2001 American Institute of Physics.