Abstract
There are at least a half dozen techniques tor laterally confining excitons within semiconductor quantum wells that are currently under investigation. Strain confinement has a number of advantages not shared by the various other approaches. These include the lack of dependence on crystal growth properties, the flexibility in choosing the geometry of confining potentials, and the result that the well remains continuous and undamaged.1 These advantages have allowed us to make quantum dots as well as quantum wires from an array of dots. We have resolved quantum-wire subbands and quantum- dot levels. We observe that luminescence spectra of selectively excited dots are strongly sensitive to excitation intensity in a regime in which the luminescence of the unpatterned well is insensitive.
© 1991 Optical Society of America
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