Abstract
The interband optical absorption in single quantum wells (SQWs) due to transitions between confined states and unconfined continuum states (C-U transitions) were measured, calculated, and compared to absorption due to transitions involving pairs of confined states (C-C transiitons). An In(0.25)Ga(0.75)As/GaAs SQW with a 61-A well width was used in the experiment. A simple model describes how the slow-turnon absorption line shapes characterisic of SQWs evolve into sharp steplike features as more wells are added.
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