Exciton wave function properties probed by diamagnetic shift in disordered quantum wells

Abstract

Absorption spectra and wave functions of optically active exciton states in disordered quantum wells are calculated. The interplay between the relative and center-of-mass part of the total exciton wave function is investigated using a perpendicular magnetic field. The diamagnetic shift varies strongly in correspondence with the wave function localization. The full solution reveals failures of the simple factorization in relative and center-of-mass coordinates even for weak global disorder.