Observation of Interband Two-Photon Absorption Saturation in CdS Nanocrystals

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dc.creatorHe, Jun
dc.creatorMi, Jun
dc.creatorLi, Heping
dc.creatorJi, Wei
dc.date2005-10-15
dc.date.accessioned2026-07-07T06:44:24Z
dc.date.available2026-07-07T06:44:24Z
dc.descriptionWe report the observation of interband two-photon absorption (TPA) saturation in cadmium sulfide nanocrystals (CdS NCs) under intense femtosecond laser excitation with 1.6-eV photon energy. The observation has been compared to interband TPA saturation in bulk CdS under the same experimental conditions. By using both Z-scan technique and transient absorption measurement, the saturation intensity has been determined to be 190 GW/cm^2 for CdS NCs of 4-nm diameter, which shows two orders of magnitude greater than that for CdS bulk crystal. The results are in agreement with an inhomogeneously-broadened, saturated TPA model.
dc.description18 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0510402
dc.identifierhttp://arxiv.org/abs/cond-mat/0510402
dc.identifierJ. Phys. Chem. B 109, 19184 (2005)
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/102767
dc.subjectMaterials Science
dc.titleObservation of Interband Two-Photon Absorption Saturation in CdS Nanocrystals
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