Abstract
Transient hole burning experiments on a picosecond time scale give a convincing proof of inhomogeneous broadening of intersubband absorption bands for the first time. At excitation intensities of 400 kW/cm2 population holes of ~60 cm−1 widths are found in narrow n-modulation doped GaAs/Al0.35Ga0.65As quantum well structures. At intensities of a few MW/cm2 „holes“ in the absorption spectra due to a χ(3) effect are observed.KeywordsSpectral WidthProbe PulseTransient AbsorptionHole BurningTransient Absorption SpectrumThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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