Nano Archive

Uncovering forbidden optical transitions in PbSe nanocrystals

Peterson, Jeffrey J. and Huang, Libai and Delerue, Christophe and Allan, Guy and Krauss, Todd D. (2007) Uncovering forbidden optical transitions in PbSe nanocrystals. NANO LETTERS, 7 (12). pp. 3827-3831.

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The 1S(h,e)-1P(e,h) exciton transition energy of PbSe nanocrystals was determined via two-photon photoluminescence excitation spectroscopy and was found to be in good agreement with predictions from a tight-binding calculation. The two-photon excitation peak occurs at energies very close to a strong feature in the one-photon absorption spectrum and suggests that it should be assigned as a formally forbidden S-P transition. Leading explanations for the unusual strength of the forbidden transition are discussed.

Item Type:Article
Subjects:Physical Science > Photonics
ID Code:1842
Deposited By:Farnush Anwar
Deposited On:23 Dec 2008 10:33
Last Modified:23 Dec 2008 10:33

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