Self-assembling quantum dot lattices through nucleation site engineering
نویسندگان
چکیده
The long range ordering of epitaxial semiconductor quantum dots is investigated using several crystal growth techniques on prepatterned substrates. We have developed two nucleation site control techniques: one which uses localized surface chemical potential engineering and one which uses localized surface strain engineering. We present experimental results that demonstrate the ability to create ordered quantum dot lattices and discuss the different mechanisms involved in the long range ordering of quantum dots. r 2002 Elsevier Science B.V. All rights reserved.
منابع مشابه
Effect of asymmetric quantum dot rings in electron transport through a quantum wire
The electronic conductance at zero temperature through a quantum wire with side-connected asymmetric quantum ring (as a scatter system) is theoretically studied using the non-interacting Hamiltonian Anderson tunneling method. In this paper we concentrate on the configuration of the quantum dot rings. We show that the asymmetric structure of QD-scatter system strongly influences the amplitude an...
متن کاملEffect of asymmetric quantum dot rings in electron transport through a quantum wire
The electronic conductance at zero temperature through a quantum wire with side-connected asymmetric quantum ring (as a scatter system) is theoretically studied using the non-interacting Hamiltonian Anderson tunneling method. In this paper we concentrate on the configuration of the quantum dot rings. We show that the asymmetric structure of QD-scatter system strongly influences the amplitude an...
متن کاملBistability in the Electric Current through a Quantum-Dot Capacitively Coupled to a Charge-Qubit
We investigate the electronic transport through a single-level quantum-dot which is capacitively coupled to a charge-qubit. By employing the method of nonequilibrium Green's functions, we calculate the electric current through quantum dot at finite bias voltages. The Green's functions and self-energies of the system are calculated perturbatively and self-consistently to the second order of inte...
متن کاملThree-dimensional control of self-assembled quantum dot configurations.
We demonstrate techniques for growing three-dimensional quantum dot configurations using molecular beam epitaxy on faceted template islands. Molecular beam shadowing leads to new geometries through selective nucleation of the dots on the template edges. Strain-induced stacking converts the planar configurations into three-dimensional structures. The resulting dot morphologies and their configur...
متن کاملGrazing-incidence small-angle X-ray scattering: application to the study of quantum dot lattices
The ordering of quantum dots in three-dimensional quantum dot lattices is investigated by grazing-incidence small-angle X-ray scattering (GISAXS). Theoretical models describing GISAXS intensity distributions for three general classes of lattices of quantum dots are proposed. The classes differ in the type of disorder of the positions of the quantum dots. The models enable full structure determi...
متن کامل