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Quantum beats of free and bound excitons in GaAs/Al(x)Ga(1-x)As quantum wells

: Leo, K.; Shah, J.; Köhler, K.; Damen, T.C.


Physical Review. B 42 (1990), No.17, pp.11359-11361 : Abb.,Lit.
ISSN: 0163-1829
ISSN: 1098-0121
ISSN: 0556-2805
Journal Article
Fraunhofer IAF ()
coupled quantum wells; gekoppelte Quantum Wells; III-V Halbleiter; III-V semiconductors; photoluminescence; PL; quantum wells; time resolved PL; tunneling; tunnelling; tunneln; Zeitaufgelöste PL

We report the observation of quantum beats in the decay of the coherent polarization of intrinsic excitations in GaAs/GaAlAs quantum wells. The beating arises from interference of excitons with slightly different quantum confinement energy due to well-width fluctuations.