Le Journal de Physique IV 03 (1993) C5-385-C5-388
Excitons in a single quantum well wire: optical response and application to the gratingsA. D'ANDREA1 and L. PILOZZI2
1 Istituto di Metodologie Avanzate Inorganiche, CNR, 00016 Monterotondo S., Roma, Italy
2 Dipartimento di Fisica, II Università di Roma, via E. Carnevale, 00173 Roma, Italy
Variational envelope function of an exciton in a single quantum well wire (SQWW) is described in the framework of the effective mass approximation for two-band model. The SQWW considered has thickness values : Lz < aB, along the growth axis of the sample, and Lx > 3aB for the lateral dimension (where aB is the Bohr radius). Exciton polarizations and optical response for SQWW and for a grating of QWWs are given. The role of the local fields on the optical response of these two different superstructures is pointed out.
© EDP Sciences 1993