<b>Dataset for Communications Materials Article: Efficient single-photon emission via quantum-confined charge </b><b>funneling to quantum dots</b>

<p dir="ltr">Data presented in Communications Materials Article '<b>Efficient single-photon emission via quantum-confined charge </b><b>funneling to quantum dots.' (</b>2025)</p><p dir="ltr"><b>Data description:</b></p><p dir="ltr"><b>Figure 2c:</b> Ga and Al composition (%) along line scans A and B through the charge carrier funnel.</p><p dir="ltr"><b>Figure 2d:</b> Data (height) for the atomic force microscopy (AFM) image (topography) for a typical energy-landscape modified quantum dot (ELM-QD).</p><p dir="ltr"><b>Figure 2e:</b> Topography and the corresponding bandgap energy profile along two AFM line scans. The bandgap energy was calculated using the thickness of the funnel AlGaAs layer and the Al composition.</p><p dir="ltr"><b>Figures 3a and 3b:</b> Spatial maps of photoluminescence (PL) spectra for representative ELM-QDs. Micro-PL spectra were measured using an optical excitation beam of ~1 micron in diameter translated across the surface of the ELM-QDs.</p><p dir="ltr"><b>Figure 3a:</b> Inset: Micro-PL spectrum at the position of the ELM-QD in Fig. 3a. </p><p dir="ltr"><b>Figure 3c:</b> Remote optical excitation of ELM-QDs: normalised PL intensity as a function of the distance from the point of excitation for ELM-QDs and ordinary QDs (o-QDs).</p><p dir="ltr"><b>Figure 4a:</b> PL spectrum data for the ELM-QD in Fig. 3a of the Article (ELM-QD 1) for an excitation power of 100 nW. </p><p dir="ltr"><b>Figure 4b:</b> Pump power dependence of the peak PL intensity for a typical ELM-QD (blue) compared to a typical o-QD (red). </p><p dir="ltr"><b>Figure 4c:</b> Second-order correlation function, g⁽²⁾, for photon emission from ELM-QD 1, collected after spectrally filtering the PL emission. </p><p dir="ltr"><b>Figure 4c inset:</b> PL spectrum data for ELM-QD1 after spectral filtering. </p>