Carrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum

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dc.creatorRupasov, Valery I.
dc.creatorKlimov, Victor I.
dc.date2007-07-13
dc.date.accessioned2026-07-07T08:18:23Z
dc.date.available2026-07-07T08:18:23Z
dc.descriptionWe propose a novel mechanism for photogeneration of multiexcitons by single photons (carrier multiplication) in semiconductor nanocrystals. In this mechanism, the Coulomb interaction between two valence-band electrons involving their transfer to the conduction band creates a virtual biexciton from vacuum that is then converted into a real biexciton by photon absorption on an intraband optical transition. This mechanism is inactive in bulk semiconductors as momentum conservation suppresses intraband absorption. However, it becomes highly efficient in zero-dimensional nanocrystals and can provide a significant contribution to carrier multiplication in these materials.
dc.description15 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0707.2112
dc.identifierhttp://arxiv.org/abs/0707.2112
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/134412
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.subjectOther Condensed Matter
dc.titleCarrier Multiplication in Nanocrystals via Photostimulated Generation of Biexcitons from Vacuum
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