Transient gain measurements are performed for (GaIn)As quantum well structures. Gain up to gL=2 × 10-3 per quantum well is observed on a time scale of several hundred picoseconds. A microscopic theory quantitatively provides theoretical support and yields the carrier density as a function of time by matching the spectral shapes and intensities to the experiment. The decay rate of the population density is found to be proportional to the carrier density, which underlines the importance of monomolecular recombination processes.
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)