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(a) 5 K PL and PLE spectra for 10 period, 2-nm-thick multiquantum wells, (b) PL energy as a function of temperature. The solid line is a fit to Eq. (1) with the parameters , , , and . (c) The integrated intensity as a function of temperature. The solid line is a fit to Eq. (2) with an activation energies of and .
PLE spectrum and pump-probe signal amplitude as a function of wavelength.
Excitation density dependent pump-probe signals.
Decay constants as a function of excitation density.
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