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Control of polarized single quantum dot emission in high-quality-factor microcavity pillars
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) (a) PL spectra at 5 K at high power for a elliptical pillar for orthogonal polarizations and , parallel (high , solid line) and perpendicular (low , dashed line) to the long axis of the pillar. The inset shows a scanning electron micrograph of one such elliptical pillar. (b) Low power PL spectra in the single dot regime at 30 K for orthogonal polarizations (solid line) and (dashed line). The dot on resonance with the polarized mode at 1.315 eV shows a degree of linear polarization greater than 0.9. The polarized mode of Fig. 1(a) is shown here again by the dotted line. The inset shows the change in the low power PL spectrum as the single dot is tuned by variation of temperature through the polarized cavity mode .

Image of FIG. 2.
FIG. 2.

(Color online) (a) Intensity of the emission of a quantum dot [labeled in the inset of Fig. 1(b)] as a function of detuning (by variation of temperature) from the polarized cavity mode, for two orthogonal polarizations, and . (b) The degree of polarization (Ref. 12) of the exciton emission of four dots, labeled , as a function of their detuning from the polarized cavity mode.

Image of FIG. 3.
FIG. 3.

Calculated fields for (a) polarized and (b) polarized modes in an infinite homogeneous elliptical pillar with axes 2 and . In (a), the component of the electric field is shown, in (b) ; in each case the other component is two orders of magnitude smaller. (c) Cross sections along the axis [dashed lines in (a)and (b)] for the two modes. The dotted lines show the position of the surface of the pillar.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Control of polarized single quantum dot emission in high-quality-factor microcavity pillars