Extended Data Fig. 5: Dominance of Δαzz in the observed TERS.
From: Visualizing vibrational normal modes of a single molecule with atomically confined light
Raman images of the 388-cm−1 mode, simulated using out-of-plane (zz) and in-plane (xx) polarizability differences, and the map of the xx component of the polarizability at equilibrium (α0,xx). The Δαzz component reproduces the experiment, whereas the Δαxx fails despite its large magnitude. The charge accumulation at the edges upon polarization is demonstrated in both Δαxx and α0,xx. This trend applies to all of the observed normal modes.
