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Electric-field switching of exciton spin splitting in coupled quantum dots
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View: Figures


Image of FIG. 1.
FIG. 1.

Schematic diagram of a CQD containing a single magnetic ion.

Image of FIG. 2.
FIG. 2.

The exciton energy spectrum as a function of electric field (the upper panel) and the electro-PL spectrum (the lower panel) in CQD. , the radius , and the distance between the two QDs .

Image of FIG. 3.
FIG. 3.

The same as Fig. 2 but for the CQD with larger spatial separation between the two QDs, .

Image of FIG. 4.
FIG. 4.

(a) The schematic diagram of the four-level model. (b) The hole energy as a function of distance between the two QDs. The solid lines denote the hole energies in CQDs with the HH-LH coupling; the dotted lines denote that without the HH-LH coupling. (c) The overlap factor between the electron ground state and the hole ground states (the solid lines) and first-excited hole states (the dotted lines) as a function of the distance between the two QDs (the black lines) and the electric fields (the red lines) for .

Image of FIG. 5.
FIG. 5.

The contour plot of the spin splitting of exciton in a CQD as a function of the distances and external electric fields.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Electric-field switching of exciton spin splitting in coupled quantum dots