Two-photon-pumped lasing from colloidal nanocrystal quantum dots

Chunfeng Zhang, Fan Zhang, Ting Zhu, An Cheng, Jian Xu, Qi Zhang, Suzanne E. Mohney, Ron H. Henderson, Y. Andrew Wang

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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 (∼7 ps) in the time-resolved photoluminescence.

Original languageEnglish (US)
Pages (from-to)2437-2439
Number of pages3
JournalOptics Letters
Issue number21
StatePublished - Nov 1 2008

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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  • Cite this

    Zhang, C., Zhang, F., Zhu, T., Cheng, A., Xu, J., Zhang, Q., Mohney, S. E., Henderson, R. H., & Wang, Y. A. (2008). Two-photon-pumped lasing from colloidal nanocrystal quantum dots. Optics Letters, 33(21), 2437-2439.