Time resolved measurements on low-density single quantum dots at 1300 nm

We present time integrated and time resolved measurements on single In/As quantum dots (QD) emitting at 1300 nm, at 10 K, embedded in a planar microcavity. We clearly identify a standard spectroscopic signature from single QDs and to compare the exciton line width and biexciton (BX) binding energy for several QDs. We present this data for QDs spatially selected by etched mesas and metallic apertures. Time resolved photoluminescence (PL) from single electron-hole recombination in the ground state of the QD is investigated as a function of excitation power and temperature. The measurements reveal the presence of a background emission that delays the PL of excitons in the ground state. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.