Abstract
We have calculated the excitonic optical absorption of a superlattice in the presence of electric and magnetic fields aligned with the superlattice axis. The main excitonic effects are an infrared shift and Stark/Landau ladder anticrossings. We show that an independent intrawell or interwell bidimensional exciton picture is accurate except when two transitions approach each other as the external fields are varied, in which case the interaction between these excitons causes the anticrossings previously observed in experiment.
- Received 28 December 1994
DOI:https://doi.org/10.1103/PhysRevB.51.14414
©1995 American Physical Society