Le Journal de Physique IV 03 (1993) C5-191-C5-194
Fano resonances in quasi-2D excitonsJ.A. BRUM1 and D. OBERLI2
1 Instituto de Física "Gleb Wataghin", DFESCM, UNICAMP, 13086 Campinas (SP), Brazil
2 Walter Schottky Institut, TU-München, 8046 Garching, Germany
We study the formation of Fano resonances in excitonic states in quantum wells. The quasi-2D excitons are modeled by an effective 2D Coulomb interaction. In this approach, uncoupled excitons originate from different pairs of subbands. The 3D character of the Coulomb attraction couples the excitons having the same in-plane symmetry. A typical Fano resonance is formed in the absorption spectra and is characterized by a broadening of the bound exciton peak and a dip in the continuum background.
© EDP Sciences 1993