Fig. 3: Comparison between experiments and theory.
a Scheme of phonon-assisted hot PL. The incident, \(\hslash\)ωi, and outgoing, \(\hslash\)ωf, photons are shown by dotted magenta vertical arrows. The phonons participating in the cascade are indicated by the green arrows. The e–h pair dispersion curve is the blue parabola. The light cone is shown by red dashed lines. b Calculated S/AS spectra at different T. c IS/IAS for different numbers of cascade steps as a function of T. Filled circles are experimental data at 532 nm. The fit with Eq. (9) is indicated by dot-dashed lines. d Extended BZ of 1L-WSe2. Corresponding valleys are marked as Γ, K, \(K^{\prime}\) and Λi, \({\Lambda }_{i}^{\prime}\) (i = 1, …, 3). e Experimental data at 160K (black line) compared to the calculated spectrum from Eq. (2) for no = 0.5. f Ratio of measured intensities of j = 1 to j = 2 peaks and corresponding fit with Eq. (10).
