TY - JOUR
T1 - Fine structure and selection rules for excitonic transitions in silicon nanostructures
AU - Dovrat, M.
AU - Shalibo, Y.
AU - Arad, N.
AU - Popov, I.
AU - Lee, S. T.
AU - Sa'Ar, A.
PY - 2009/3/3
Y1 - 2009/3/3
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=63249086082&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.79.125306
DO - 10.1103/PhysRevB.79.125306
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:63249086082
SN - 1098-0121
VL - 79
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 12
M1 - 125306
ER -