Figure 2: Photocurrent mapping.
From: Distinguishing between plasmon-induced and photoexcited carriers in a device geometry
Schematic of TE (a) excitations used to generate photocurrent maps. The laser wavelength is tuned to the resonance of the plasmonic nanowires (∼675 nm, wire width 273 nm). Photocurrent maps of a (b) Schottky and (c) an Ohmic device using TE-polarized light. (d) Schematic of TM- polarized light excitation. Photocurrent maps of a (e) Schottky and (f) an Ohmic device. In the Schottky device, photocurrent production is drastically reduced while in the Ohmic device, photocurrent is observed throughout the metal nanostructure and in the nanowires.
