Web Release Date: February 12,
Semiempirical Pseudopotential Calculation of Electronic States of CdSe Quantum Rods
and
Department of Chemistry, University of California at Berkeley, Berkeley, California 94720, Materials Science Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, National Research Scientific Computing Center, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720
Received: August 17, 2001
In Final Form: December 11, 2001
Abstract:
The dependence of electronic states on the length and diameter of CdSe quantum rods is investigated using semiempirical pseudopotential calculations. Energy levels cross as the aspect ratio increases due to their different dependence on length. The crossover between the highest occupied levels leads to a transition from plane-polarized to linearly polarized light emission at aspect ratio ca. 1.3. Further increasing aspect ratio results in levels with similar symmetry converging and forming "bands". This calculation demonstrates the transition of electronic structure from zero-dimensional quantum dots to one-dimensional quantum wires.
Download the full text: PDF | HTML
