Full text loading...
(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.
Spatial mapping of μ-PL spectra from AlAs:N at 10 K.
Linearly polarized PL spectra of (a), (b) NNα pairs, and (c) NNβ pair. The origin of the polarization angle is set along the  direction. (d)Comparison of orthogonally polarized PL spectra from a NNβ center.
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).
Article metrics loading...