Fine structure and selection rules for excitonic transitions in silicon nanostructures

M. Dovrat, Y. Shalibo, N. Arad, I. Popov, S. T. Lee, A. Sa'Ar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

The excitonic fine structure, including splitting due to direct and exchange interactions, has experimentally been resolved from silicon nanocrystals and from silicon nanorods. We have found the hierarchy of levels for silicon nanorods to be different from that of silicon nanocrystals with the slower semidark state located above the faster semibright state. The results are analyzed in terms of spin and orbital selection rules indicating that the dimensionality of the exciton determines the relative contribution of the direct Coulomb and the exchange interactions in these nanostructures.

Original languageAmerican English
Article number125306
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume79
Issue number12
DOIs
StatePublished - 3 Mar 2009

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