Figure 5

Dependence of the ratio of time –integrated emission spectra taken from surface and from the edge of the sample (\({\rm{P}}({\rm{\omega }},{\rm{\theta }})\)) obtained by Eq. (3) for different time integration intervals: (a) 0–700 ps; (b) 100–200 ps; (c) 200–300 ps; (d) 300–400 ps; (e) 500–600 ps; and (f) 600–700 ps. Time interval is calculated from the start of excitation pulse. Time-integrated PL spectra measured for different angles are shown in Supplementary Fig. S2.