Abstract
The room-temperature electro-absorption in wide (∼ 150 Å) ZnCdSe quantum wells is explained in terms of the quantum-confined Franz-Keldysh effect. The heavy hole-light hole splitting has been determined both for single quantum well (SQW) and multiple quantum well heterostructures, providing an insight into the distribution of intrinsic strain. The band gap shrinkage due to the many-body Coulomb interactions is shown to be negligible in the SQW laser diode with the wide quantum well.
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