ZnSe-ZnCdSe single quantum wells: Dispersion relations and absorption processes Auteur(s): Bigenwald P, Gil B., Konczewicz L., Testud P
Conference: European-Materials-Research-Society 1996 Spring Meeting, Symposium C: UV, Blue and Green Light Emission from Semiconductor Materials (STRASBOURG (FRANCE), FR, 1996-06-04) Résumé: We have investigated theoretically the optical properties of strained (001) ZnSe-(Zn, Cd)Se single quantum wells with a low cadmium content (similar to 10%). Due to the band offset and strain energy, the electron-to-light-hole transitions are marginally type I. We compute the dispersion relations and joint density of states for a typical structure away from Gamma and show that the degeneracy call occur between lh(1) and hh(3) sub-bands in a large area of the Brillouin zone. This can cancel the selection rules for interband processes. (C) 1997 Elsevier Science S.A. |