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 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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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. |
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ISSN: | 0370-1972 1521-3951 |
DOI: | 10.1002/pssb.200303161 |