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Photothermoelectric Effects and Large Photovoltages in Plasmonic Au Nanowires with Nanogaps

Photothermoelectric Effects and Large Photovoltages in Plasmonic Au Nanowires with Nanogaps

Nanostructured metals subject to local optical interrogation can generate open-circuit photovoltages potentially useful for energy conversion and photodetection. We report a study of the photovoltage as a function of illumination position in single-metal Au nanowires and nanowires with nanogaps formed by electromigration. We use a laser scanning microscope to locally …