Fig. 2: Power, polarization, and time-resolved PL from satellites.
From: Intrinsic donor-bound excitons in ultraclean monolayer semiconductors
a Waterfall plot of normalized PL spectra at selected excitation powers. The exciton satellites dominate the spectrum at low powers. b Polarization-resolved spectrum of satellite peaks under σ+circularly polarized excitation (1 µW). Inset: power dependence of η, the degree of circular polarization, which grows with increasing power up to η ≈ 0.6. c Time-resolved PL of S1 reveals a population lifetime of 6.95 ± 0.05 μs and a polarization lifetime of 116 ± 4 ns (red line is single exponential fit). All data are from Device 2 at Vb = 0 V. Top arrows in b indicate the spectral region of integration.
