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(Color online) PL spectra for a low-density QD ensemble. The emission at 630 nm originates from the InGaP and the emission at 650–670 nm from InP QDs. Inset graph is a magnified view of the spectrum from one of the single QDs; both excitonic (X) and biexcitonic (XX) emission can be seen.
(Color online) (a) Pl spectrum for InGaP (630 nm) and InP QDs (650-680 nm) (b) Second order correlation function of X from InP QD.
(Color online) Second-order correlation function with pulsed excitation.
(Color online) Fine structure splitting of 320 μeV is shown for exciton and biexciton. Linearly polarized emission lines along (90°) and  (0°) crystallographic directions.
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