Behavior of excitonic levels in symmetric and asymmetric double quantum wells in a magnetic field

Francisco Vera, Zdenka Barticevic

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

15 Citas (Scopus)

Resumen

We studied, theoretically, the excitonic energy levels and the optical absorption spectra for double quantum wells, both symmetric and asymmetric, in the presence of a homogeneous magnetic field. Within the effective-mass approach, we expanded the excitonic wave function, in an orthogonal basis formed by the products of electron and hole wave functions in growth direction z, and one-particle solutions of the magnetic Hamiltonian in the x-y plane. We applied our method to the case of AlxGa1-xAs, for which we showed how the exciton wave functions vary, and how the basis functions are mixed in a nontrivial way by the effect of the Coulomb potential. By taking into account all the mixing between the elements in our base, we get anticrossings between excited excitonic states (to the best of our knowledge) not reported previously. The behavior in the excitonic energies and wave functions for different wells and barrier geometries is of importance in double quantum well devices.

Idioma originalInglés
Páginas (desde-hasta)7720-7725
Número de páginas6
PublicaciónJournal of Applied Physics
Volumen83
N.º12
DOI
EstadoPublicada - 15 jun 1998
Publicado de forma externa

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