Broadband THz study of excitonic resonances in the high-density regime

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dc.creatorHuber, Rupert
dc.creatorKaindl, Robert A.
dc.creatorSchmid, Ben A.
dc.creatorChemla, Daniel S.
dc.date2005-08-03
dc.date2005-09-21
dc.date.accessioned2026-07-07T06:21:57Z
dc.date.available2026-07-07T06:21:57Z
dc.descriptionWe report the first terahertz study of the intra-excitonic 1s-2p transition at high excitation densities in GaAs/AlGaAs quantum wells. A strong shift, broadening, and ultimately the disappearance of this resonance occurs with increasing density, after ultrafast photoexcitation at the near-infrared exciton line. Densities of excitons and unbound electron-hole pairs are followed quantitatively using a model of the composite terahertz dielectric response. Comparison with near-infrared absorption changes reveals a significantly enhanced energy shift and broadening of the intra-excitonic resonance.
dc.description4 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0508082
dc.identifierhttp://arxiv.org/abs/cond-mat/0508082
dc.identifierPhys. Rev. B 72, 161314(R) (2005)
dc.identifierdoi:10.1103/PhysRevB.72.161314
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/95766
dc.subjectMesoscale and Nanoscale Physics
dc.subjectStrongly Correlated Electrons
dc.titleBroadband THz study of excitonic resonances in the high-density regime
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