Fig. 4
From: Suppression of the quantum-confined Stark effect in polar nitride heterostructures
Time-resolved µ-photoluminescence transients. The time-resolved µ-photoluminescence (µ-TRPL) transients of the samples within the QCSE regime shown in a reveal the decreasing exciton decay times due to smaller residual electric field strengths in samples with decreased barrier widths. b µ-TRPL transients of the samples within the confinement regime show a much smaller, constant decay time due to the eliminated electric field strength. The temporal resolution is better than 10 ps. The exciton lifetimes (τ1,2) for each biexponential decay are given in the legend; the dominant lifetime is always highlighted in bold. All µ-TRPL transients are recorded at the individual ND luminescence maxima
