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DT spectra for time delays of , 10, 100, and 500 ps, taken at excitation densities of (a) 4 ehp/dot , (b) 10 ehp/dot , and (c) 40 ehp/dot . The approximate positions of the QD ground and excited states are indicated by the dotted and dashed lines, respectively. Part (a) was previously published in Ref. 14 and is reprinted here with permission.
Experimental DT spectrum for and (blue circles) from Fig. 1(a) compared to the fitted curve generated by our model (red solid line) from 1021–1250 nm.
(a) Time-dependent DT signals for densities of , 10, and 40 ehp/dot at 1250 nm. (b) Comparison between normalized DT signals at densities of 4 and 40 ehp/dot at 1135 nm (green and blue curves) and 1250 nm (red and purple curves).
(a) Time-dependent DT signals for densities of , 10, and 40 ehp/dot at 1047 nm. (b) Comparison between normalized DT signals at the QW state (939 nm) and the slowly recovering component of the 1047 nm DT signal [obtained from Fig. 4(a) by taking , multiplying by −1 and scaling for comparison] at .
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