Enhanced dipole-dipole interaction of CdSe/CdS nanocrystal quantum dots inside a planar microcavity

摘要

The energy transfer (ET) dynamics of closely packed CdSe/CdS nanocrystal quantum dots (NQDs) embedded in a planar microcavity were studied by using time-resolved photoluminescence measurements. An increase of ～20% was observed in the rates of ET from smaller to larger NQDs in the mierocavity as compared with those measured in free space. This behavior was attributed to the enhanced dipole-dipole interactions between donor and acceptor NQDs at the spectral positions of the cavity modes.