Extended Data Fig. 2: Spatially resolved PL intensity and intensity fluctuations.
a, Spatial variations of the PL intensity \(\overline{{A}_{\max }}\) (black line) and \(\sigma ({A}_{\max })/\overline{{A}_{\max }}\) (violet bars) measured at T = 330 mK and P = 17 nW, that is for the MI phase. Both \(\overline{{A}_{\max }}\) and \(\sigma ({A}_{\max })/\overline{{A}_{\max }}\) vary weakly in the 3 μm central region of the laser excited region, evidencing that the MI phase is homogeneous across more than 100 lattice sites. Outside this region we note that \(\sigma ({A}_{\max })/\overline{{A}_{\max }}\) increases steeply while \(\overline{{A}_{\max }}\) drops, which signals that excitons realise a normal fluid. b, Same measurements obtained for P = 8.2 nW, that is for the CB phase. Results are extracted from the experiments reported in Fig. 2.
