Layer-resolved photoelectron diffraction: Electron attenuation anisotropy in GaAs

► Unique layer-resolved photoelectron diffraction polar plots. ► Crystals with AlAs monolayers buried under the GaAs(0 0 1) c(4×4) surface. ► Large electron attenuation anisotropy with a nonexponential intensity decay. ► Pronounced differences of polar plots from even and odd Al sublayers.