Figure 1

(Color online) (a) Scanning electron microscopy image of the cavity structure with the approximate location of the QDs. (b) Photoluminescence spectra under nonresonant excitation showing the emission of CM and the QD1, QD2 excitons for 7 K for X (black line) and Y (red line) polarizations. (c) Energies of the QD2 and CM emission lines as a function of temperature. The CM was shifted to an energy higher than in (b) by Xe adsorption. (d) Emission intensity of QD1 (red) and QD2 (black) as a function of detuning for X polarization. The intensities are normalized to the total emission (the sum of the QD and the CM intensities).Reuse & Permissions

Figure 2

(Color online) Decay time of the QD emission as a function of the detuning for both QDs. The detuning scales are shifted to account for the energy difference between the emission of QD1 and QD2. Up and left (down and right) scales correspond to QD1 (QD2). In the detuning range between the vertical dashed lines both QDs are simultaneously coupled to the CM.Reuse & Permissions

Figure 3

(Color online) Emission intensity dependence of QD1, QD2, and CM (color scale) on excitation (vertical axis) and emission (horizontal axis) energies at 37 K. The PLE maxima are around 37 meV and 40 meV above the emission for QD1 and QD2, respectively. The inset shows a diagram of the involved states and transitions. $\text{QD}1,2\text{−}s,p$ indicate the first and second exciton states of each QD. CM is the energy of a cavity photon. Red solid arrows show the excitation (up) and emission (down) processes of QD1. The dashed red arrow indicates the QD2 exciton transition induced by its coupling to QD1 through the cavity. Black arrows stand for the reciprocal case.Reuse & Permissions

Figure 4

(Color online) PLE spectra of QD1 and QD2 for X polarization at (a) 28 K and (b) 36 K. The excitation intensity is 1.5 mW in both cases. P1(P2) vertical line marks the $p$-state energy of QD1(QD2). All profiles are well fitted by two Gaussians. Dashed lines correspond to the PLE peak at the excitation energy of the $p$ state of the other QD. Inset: dependence of the QD1 PLE intensity on excitation intensity for intradot (red crosses) and interdot (blue triangles) excitation.Reuse & Permissions