Figure 2

Angle-resolved micro-photoluminescence (ARPL) and their emission pattern. (a) ARPL emission spectrum in 2D contour-plot style (linear intensity map) for the WS₂/WSe₂ HS at 10 K under nonresonant CW laser excitation. The corresponding angle-integrated line spectrum is depicted to the right (b). Recorded data (points) are shown with multi-Gaussian-fit model curves (solid lines, color-coded from blue to red with decreasing mode energy). (c) Extracted radiation emission patterns (color-coded data points) for different excitonic species seen in (a) and their intensity variation with emission angle. For clarity, a vertical offset is applied. Curved lines are guides to the eyes. (d–f) Simulated far-field emission (data points) at three different spectral positions, given in P (W/m²), for hypothetical in- and out-of-plane dipole emitters (X⁰_WS2/WSe2 at 2.013 eV/1.70 eV, and X_IL at 1.482 eV, respectively) in the simulated HS environment. Solid lines in (c–f) indicate the differently-strong parabolic trends towards higher angles, as guides to the eyes.