Schematic view of a double QD embedded in a suspended semiconductor slab with a width of . The vertical width of the dot is and the interdot distance is . The double dot is located in the center of the slab. Here we simply illustrate the dots with blocks.
Dispersion relations for (a) dilatational and (b) flexural waves with .
Density of states (arbitrary units) as a function of energy for (a) dilatational and (b) flexural waves. The arrows are used to indicate the van Hove singularities.
Relaxation rate as a function of electric field . The arrow indicates the enhanced relaxation rate. The inset shows a suppressed relaxation rate (arrow). The double dot is located in the center of the slab.
Dependence of the specific electric field for the suppressed and enhanced rates on the width of the slab . The inset shows the energy difference in the presence of the electric field.
Relaxation rate as a function of electric field for fixed position of the double QD . The arrows indicate two enhanced relaxation rates. The inset shows the ratio of the rates for dilatational waves and flexural waves .
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