| Literature DB >> 18978879 |
Chunfeng Zhang1, Fan Zhang, Ting Zhu, An Cheng, Jian Xu, Qi Zhang, Suzanne E Mohney, Ron H Henderson, Y Andrew Wang.
Abstract
Upconverted lasing in the nonlinear, two-photon absorption regime has been demonstrated, for the first time to the best of our knowledge in colloidal nanocrystal quantum dots (NQDs). Upon pulse excitation at sub-bandgap photon energies the radiative recombination of excitons in close-packed CdSe/CdS/ZnS core-shell NQDs was found to be sufficiently fast to compete with the intrinsic nonradiative Auger recombination, as confirmed by the presence of a fast decay (approximately 7 ps) in the time-resolved photoluminescence.Entities:
Year: 2008 PMID： 18978879 DOI： 10.1364/ol.33.002437
Source DB: PubMed Journal: Opt Lett ISSN： 0146-9592 Impact factor: 3.776