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Scanning electron microscopy (SEM) images of the anisotropic QD. The semielliptical green shaded area represents the effective anisotropic confinement region of the electrons. represents the configuration of charge excitation when both incident and scattered light are parallel to the interdot axis. represents the same when they are perpendicular to the interdot axis. The energy parabola along the major and minor axes are shown with the respective excitations and . The bottom panel shows the inelastic light scattering charge excitation spectra for and configurations. The spectra are shifted vertically for clarity.
Inelastic light scattering resonant enhancement profiles of the intershell charge collective modes in the two polarization configurations.
Left vertical panels: SEM images of the anisotropic QD with different interdot distance . Right vertical panels: charge excitation spectra for and polarization configurations.
Evolution of the energy splitting between the two charge modes in and polarization configurations as a function of the interdot distance. The insets show SEM images of the QDs corresponding to the two extreme points.
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