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Multiple-photon spectrum of CdS semiconductor quantum dot for bioimaging
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).ORCID iD: 0000-0002-2442-1809
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).ORCID iD: 0000-0003-0007-0394
KTH, School of Biotechnology (BIO), Theoretical Chemistry (closed 20110512).ORCID iD: 0000-0002-1763-9383
2006 (English)In: Thin Solid Films, ISSN 0040-6090, E-ISSN 1879-2731, Vol. 515, no 2, 842-845 p.Article in journal (Refereed) Published
Abstract [en]

We study the dynamic processes of multiple-photon absorption and emission in a semiconductor quantum dot. By the non-perturbative time-dependent Schrodinger equation, it is shown that electrons in the quantum dot can be optically excited from the valence band to the conduction band via multiphoton processes, leaving holes in the valence band. The radiative recombination of the conduction-band electrons with the valence-band holes results in optical emission of a single photon having an energy which is larger than the input photon energy, resulting in the high-photon-energy luminescence from the quantum dot activated by low-energy photons to emit radiation in the visible optical regime for bioimaging application.

Place, publisher, year, edition, pages
2006. Vol. 515, no 2, 842-845 p.
Keyword [en]
multiple-photon absorption, CdS semiconductor quantum dot, excited electronic state, in-vivo, microcrystals, crystallites
National Category
Chemical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-16059DOI: 10.1016/j.tsf.2005.12.207ISI: 000241220600113Scopus ID: 2-s2.0-33748751686OAI: oai:DiVA.org:kth-16059DiVA: diva2:334101
Note
QC 20100525 QC 20110928. Conference: 12th International Conference on Thin Films. BRATISLAVA, SLOVAKIA. SEP 15-20, 2002Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2011-09-28Bibliographically approved

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Fu, YingLuo, YiÅgren, Hans

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