Exciton dynamics studied via internal THz transitions

We employ a novel, ultrafast terahertz probe to investigate the dynamical interplay of optically‐induced excitons and unbound electron–hole pairs in GaAs quantum wells. Resonant creation of heavy‐hole excitons induces a new low‐energy oscillator linked to transitions between the internal exciton deg...

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Veröffentlicht in:Physica Status Solidi (b) 2003-08, Vol.238 (3), p.451-454
Hauptverfasser: Kaindl, R. A., Hägele, D., Carnahan, M. A., Lövenich, R., Chemla, D. S.
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Sprache:eng
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Zusammenfassung:We employ a novel, ultrafast terahertz probe to investigate the dynamical interplay of optically‐induced excitons and unbound electron–hole pairs in GaAs quantum wells. Resonant creation of heavy‐hole excitons induces a new low‐energy oscillator linked to transitions between the internal exciton degrees of freedom. The time‐resolved terahertz optical conductivity is found to be a probe well suited for studies of fundamental processes such as formation, relaxation and ionization of excitons.
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200303161