Abstract
We report the first experiment which relates electronic transport and intraband (intersubband) absorption in a biased superlattice. Zener-coupled Wannier–Stark ladders far in the continuum are observed in an n-type GaAs/AlGaAs superlattice using infrared spectroscopy. Under the same conditions, transport reveals the formation of electric-field domains, related to tunneling of electrons to the next-nearest superlattice period.
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