Lattice of self-assembled quantum dots:
Controlled growth and characterization.

We study the formation of a lattice of self-assembled quantum dots on patterned substrates using nanolithography by atomic force microscopy developed at the Laboratório de Nanoscopia do Van de Graaff (PUC-Rio). The pattern introduced should allow the study of the interaction between the quantum dots in an ordered array. Coupling effects should be probed as a function of the lattice parameter. One should be able to identify the relative contribution of the strain field and wavefunction overlap to the gap energy of the quantum dots lattice.

Fig. 1 AFM image of a network of InAs/InP quantum dots grown on a pre-patterned substrate by lithography using a atomic force microscope.

Fig. 2 AFM image of a network of InAs/InP quantum dots grown on a pre-patterned substrate by lithography using a atomic force microscope.