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Visible single-photon emission from a nitrogen impurity center in AlAs
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View: Figures


Image of FIG. 1.
FIG. 1.

(a) Low-temperature PL spectrum of N δ-doped AlAs. Sharp emission lines are observed at below the X conduction band minima of AlAs. (b) Double logarithmic plot of PL peak intensity vs. N sheet density. The peak intensities increase quadratically with the N concentration, indicating that the emission comes from excitons bound to NN pairs.

Image of FIG. 2.
FIG. 2.

Spatial mapping of μ-PL spectra from AlAs:N at 10 K.

Image of FIG. 3.
FIG. 3.

Linearly polarized PL spectra of (a), (b) NNα pairs, and (c) NNβ pair. The origin of the polarization angle is set along the [110] direction. (d)Comparison of orthogonally polarized PL spectra from a NNβ center.

Image of FIG. 4.
FIG. 4.

Second-order correlation function for photons emitted from a single NNβ center at 10 K. A time bin in this plot is 512 ps. The red curve shows the result of fitting, giving g(2)(0) = 0.33 and τd = 16 ns. The inset shows the corresponding PL spectrum emitting at 2.165 eV (572 nm).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Visible single-photon emission from a nitrogen impurity center in AlAs