In InxGa1-xAs quantum dots (QDs), the plot of peak emission energies versus the total amount of indium exhibits a well defined pattern, which is independent of the indium concentration. Moreover, photoluminescence spectra of InAs QDs grown by atomic layer molecular beam epitaxy (ALMBE) roughly coincide with those of In"Ga0.5As QDs grown by metalorganic vapor phase deposition. We suggest that the total amount of In rather than the nominal In concentration determines the emission energy of these two sets of QDs, and that In interdiffusion is rather strong in ALMBE growth. © 2001 American Institute of Physics.
Atomic equilibrium concentrations in (InGa)As quantum dots / M., Galluppi; Frova, Andrea; Capizzi, Mario; F., Boscherini; P., Frigeri; S., Franchi; A., Passaseo. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - STAMPA. - 78:20(2001), pp. 3121-3123. [10.1063/1.1372202]
Atomic equilibrium concentrations in (InGa)As quantum dots
FROVA, Andrea;CAPIZZI, Mario;
2001
Abstract
In InxGa1-xAs quantum dots (QDs), the plot of peak emission energies versus the total amount of indium exhibits a well defined pattern, which is independent of the indium concentration. Moreover, photoluminescence spectra of InAs QDs grown by atomic layer molecular beam epitaxy (ALMBE) roughly coincide with those of In"Ga0.5As QDs grown by metalorganic vapor phase deposition. We suggest that the total amount of In rather than the nominal In concentration determines the emission energy of these two sets of QDs, and that In interdiffusion is rather strong in ALMBE growth. © 2001 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
