Full text loading...
(a) Schematic of the single photon source under study: an InGaAs QD deterministically coupled to the fundamental mode of a micropillar cavity. The pillar schematic has been truncated to show the QD. (b) Emission intensity of the source as a function of energy and temperature. The dotted line shows the evolution of the mode energy with temperature. (c) Right axis: Measured decay time for the QD exciton line in the pillar (squares) and in the planar cavity (circles) as a function of temperature. Left axis: Corresponding Purcell effect. Top axis: detuning between the QD emission line and the cavity mode for the QD in the pillar cavity. Lines are guides to the eyes.
(a) and (b) Measured autocorrelation function for various excitation powers for the QD in the pillar cavity at detuning (11 K) (a) and at resonance (38K) (b). Curves are vertically shifted for clarity. (c) Auto-correlation function at zero delay as a function of the excitation power normalized to the saturation power for both temperatures.
(a) Emission spectrum measured at 27 K for the QD in the pillar cavity. (b) Correlation function measured at 27 K. The red line corresponds to the autocorrelation function of the QD exciton line, while the black line corresponds to the cross correlation between the QD emission line and the cavity like emission line. (c) Measured obtained in auto or cross correlation for three temperatures, corresponding to three detunings.
(a) Symbols: measured for a QD in the planar cavity (diamonds) or for the QD in the pillar cavity for two excitation powers with creation of carriers in the wetting layer (circles, squares) or in the p-shell of the QD (triangles). Lines: calculated for in the absence of Purcell effect, . are adjusted to account for the measured for the QD in the planar cavity. (b) Schematic of the QD and QW states and the main decay times. (c) calculated for a QD in the planar cavity ( and ) as a function of and .
Article metrics loading...