Experimental tests of effective mass and atomistic approaches to quantum dot electronic structure: Ordering of electronic states

The overall symmetry of the envelope functions for the four lowest energy excitonic states in colloidalCdSequantum dots are assigned using excitonic state-resolved pump/probe spectroscopy. These experiments yield a direct test of the two prevailing approaches to quantum dotelectronic structure: the effective mass and the atomistic approaches

Samuel L. Sewall; Ryan R. Cooney; Patanjali Kambhampati

2009

Key concepts

Scholarcy highlights

  • The overall symmetry of the envelope functions for the four lowest energy excitonic states in colloidalCdSequantum dots are assigned using excitonic state-resolved pump/probe spectroscopy. These experiments yield a direct test of the two prevailing approaches to quantum dotelectronic structure: the effective mass and the atomistic approaches
  • The experimental results are in complete agreement with the atomistic approach, whereas the effective mass approach fails to assign the correct electron symmetries for higher excitonic states

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