Figure 1

(a) Part of a larger topograph of the reconstructed Au(110) surface showing two terraces separated by a monatomic step. Markers I, II, and III indicate positions on top of an atomic row, below a step, and between atomic rows. The topograph is displayed on top of simultaneously acquired photon maps to expose the registry between topographic and photonic data. (b) Photon map of wavelengths $\lambda =671–675\mathrm{n}\mathrm{m}$. (c) Photon map of $\lambda =762–765\mathrm{n}\mathrm{m}$. (d) Representative spectra normalized to the same peak intensity. Inset: Same data without normalization. (Au tip, $V_s=3.5\mathrm{V}$, $I=100\mathrm{n}\mathrm{A}$).Reuse & Permissions

Figure 2

Cross-sectional profiles perpendicular to a monatomic step on Ag(111). (a) Light emission intensity (W tip, $V_s=2.95\mathrm{V}$, $I=5\mathrm{n}\mathrm{A}$). Circles indicate experimental data, crosses result from a calculation (see text). (b) Constant current scans ($I=5\mathrm{n}\mathrm{A}$) at $V_s=2.95\mathrm{V}$ (open circles) and $V_s=1.1\mathrm{V}$ (solid circles) recorded with the same tip as in (a). Crosses indicate the height difference between these scans. Error bars for the calculation in (a) stem from the $\pm 0.05Å$ uncertainty on the height difference data shown in (b).Reuse & Permissions

Figure 3

Cross-sectional profiles perpendicular to a monatomic step on Au(110). (a) Experimentally observed (circles) and calculated (crosses) light emission intensities. Error bars for the calculation result from the $\pm 0.02Å$ precision on the $\Delta h$ data. (b) Constant current scans at $V_s=3.5\mathrm{V}$ (open circles) and $V_s=0.7\mathrm{V}$ (solid circles) with the same tip as in (a). Data sets are shifted by 1.6 Å in the vertical direction. Inset shows a magnified detail close to the step. (c) Shift of emission peak vs lateral position measured experimentally (circles) and calculated (crosses). Zero shift corresponds to an average spectrum recorded from a large terrace which peaks at 656 nm. (Au tip, $V_s=3.5\mathrm{V}$, $I=100\mathrm{n}\mathrm{A}$).Reuse & Permissions