Fig. 1: THz nano-imaging of Al/AlOx/Al junction nano-dipole fields.
From: Visualizing heterogeneous dipole fields by terahertz light coupling in individual nano-junctions
a Schematic of the THz-sSNOM imaging method showing an incoming THz pulse to an AFM tip and an aluminum Josephson junction below it displayed as an SEM image. An enlarged image of the junction area is shown at the bottom. b Illustration of the formation of dipole fields at one instant of time as the incoming THz electric field induces free carriers in both sides of the metal lead to polarize the structure with opposite charges as in a capacitor.
