Nonradiative energy transfer between vertically coupled indirect and direct bandgap InAs quantum dots

摘要

Nonradiative energy transfer from indirect bandgap InAs/AlAs quantum dots u0002QDsu0003 to directnbandgap InAs/AlGaAs QDs was studied by steady-state and transient photoluminescence. Wendemonstrate that long excitonic lifetime in donor InAs/AlAs QDs allows one to extend the efficientnexciton energy transfer between coupled QDs to distances up to 9 nm. © 2010 American Institutenof Physics. u0004doi:10.1063/1.3532102