Multiple-photon spectrum of CdS semiconductor quantum dot for bioimaging
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
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.
multiple-photon absorption, CdS semiconductor quantum dot, excited electronic state, in-vivo, microcrystals, crystallites
IdentifiersURN: urn:nbn:se:kth:diva-16059DOI: 10.1016/j.tsf.2005.12.207ISI: 000241220600113ScopusID: 2-s2.0-33748751686OAI: oai:DiVA.org:kth-16059DiVA: diva2:334101
QC 20100525 QC 20110928. Conference: 12th International Conference on Thin Films. BRATISLAVA, SLOVAKIA. SEP 15-20, 20022010-08-052010-08-052011-09-28Bibliographically approved