Photon statistics from coupled quantum dots.
We present an optical study of two closely stacked self-assembled InAs/GaAs quantum dots. The energy spectrum and correlations between photons subsequently emitted from a single pair provide not only clear evidence of coupling between the quantum dots but also insight into the coupling mechanism. Our results are in agreement with recent theories predicting that tunneling is largely suppressed between nonidentical quantum dots and that the interaction is instead dominated by dipole-dipole coupling and phonon-assisted energy transfer processes.
Gerardot
Brian D
BD
Materials Department, University of California Santa Barbara, Santa Barbara, California 93106, USA.
Strauf
Stefan
S
de Dood
Michiel J A
MJ
Bychkov
Andrey M
AM
Badolato
Antonio
A
Hennessy
Kevin
K
Hu
Evelyn L
EL
Bouwmeester
Dirk
D
Petroff
Pierre M
PM