dc.contributor.authorZhang, Cheng
dc.contributor.authorDo, Thanh Nhut
dc.contributor.authorOng, Xuanwei
dc.contributor.authorChan, Yinthai
dc.contributor.authorTan, Howe-Siang
dc.identifier.citationZhang, C., Do, T. N., Ong, X., Chan, Y., & Tan, H.-S. (2016). Understanding the features in the ultrafast transient absorption spectra of CdSe quantum dots. Chemical Physics, 481, 157-164.en_US
dc.description.abstractWe describe a model to explain the features of the ultrafast transient absorption (TA) spectra of CdSe core type quantum dots (QDs). The measured TA spectrum consists of contributions by the ground state bleach (GSB), stimulated emission (SE) and excited state absorption (ESA) processes associated with the three lowest energy transition of the QDs. We model the shapes of the GSB, SE and ESA spectral components after fits to the linear absorption. The spectral positions of the ESA components take into account the biexcitonic binding energy. In order to obtain the correct weightage of the GSB, SE and ESA components to the TA spectrum, we enumerate the set of coherence transfer pathways associated with these processes. From our fits of the experimental TA spectra of 65 Å diameter QDs, biexcitonic binding energies for the three lowest energy transitions are obtained.en_US
dc.description.sponsorshipMOE (Min. of Education, S’pore)en_US
dc.format.extent31 p.en_US
dc.relation.ispartofseriesChemical Physicsen_US
dc.rights© 2016 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Chemical Physics, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1016/j.chemphys.2016.08.027].en_US
dc.subjectCdSe quantum dotsen_US
dc.subjectNonlinear optical spectroscopyen_US
dc.titleUnderstanding the features in the ultrafast transient absorption spectra of CdSe quantum dotsen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.description.versionAccepted versionen_US

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