We investigated the efficient optical excitation transfer in layered quantum dot structures by introducing a network of optical near-field interactions. With a density-matrix-based formalization of interdot near-field interactions, our theoretical approach allows systematic analysis of layered CdTe quantum dot systems, revealing dominant factors contributing to the efficient optical excitation transfer and demonstrating good agreement with previous experimental observations. We also show that the efficiency of optical excitation transfer could be further improved by optimizing the interaction network.

• Received 11 February 2010

DOI:https://doi.org/10.1103/PhysRevB.82.125417