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dc.contributor.authorWang, Y.en_US
dc.contributor.authorYang, X.en_US
dc.contributor.authorHe, T. C.en_US
dc.contributor.authorGao, Y.en_US
dc.contributor.authorDemir, H. V.en_US
dc.contributor.authorSun, X. W.en_US
dc.contributor.authorSun, H. D.en_US
dc.date.accessioned2015-07-28T11:59:47Z
dc.date.available2015-07-28T11:59:47Z
dc.date.issued2013en_US
dc.identifier.issn0003-6951
dc.identifier.urihttp://hdl.handle.net/11693/12032
dc.description.abstractWe have investigated the third-order optical nonlinearities of high-quality colloidal InP/ZnS core-shell quantum dots (QDs) using Z-scan technique with femtosecond pulses. The two-photon absorption cross-sections as high as 6.2 × 103 GM are observed at 800 nm (non-resonant regime) in InP/ZnS QDs with diameter of 2.8 nm, which is even larger than those of CdSe, CdS, and CdTe QDs at similar sizes. Furthermore, both of the 2.2 nm and 2.8 nm-sized InP/ZnS QDs exhibit strong saturable absorption in near resonant regime, which is attributed to large exciton Bohr radius in this material. These results strongly suggest the promising potential of InP/ZnS QDs for widespread applications, especially in two-photon excited bio-imaging and saturable absorbing.en_US
dc.language.isoEnglishen_US
dc.source.titleApplied Physics Lettersen_US
dc.relation.isversionofhttp://dx.doi.org/10.1063/1.4776702en_US
dc.subjectColloidsen_US
dc.subjectExcitonsen_US
dc.subjectHigh-speed Optical Techniquesen_US
dc.subjectIii-v Semiconductorsen_US
dc.subjectIi-vi Semiconductorsen_US
dc.subjectIndium Compoundsen_US
dc.subjectNonlinear Opticsen_US
dc.subjectSemiconductor Quantum Dotsen_US
dc.subjectTwo-photon Spectraen_US
dc.subjectUltraviolet Spectraen_US
dc.subjectVisible Spectraen_US
dc.subjectWide Band Gap Semiconductorsen_US
dc.subjectZinc Compoundsen_US
dc.titleNear resonant third-order optical nonlinearities of colloidal InP/ZnS quantum dotsen_US
dc.typeArticleen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentNational Nanotechnology Research Centeren_US
dc.citation.spage021917-1en_US
dc.citation.epage021917-4en_US
dc.citation.volumeNumber102en_US
dc.citation.issueNumber2en_US
dc.identifier.doi10.1063/1.4776702en_US
dc.publisherAIP Publishingen_US


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