Quantifying the role of surface plasmon excitation and hot carrier transport in plasmonic devices.

ABSTRACT: Harnessing photoexcited "hot" carriers in metallic nanostructures could define a new phase of non-equilibrium optoelectronics for photodetection and photocatalysis. Surface plasmons are considered pivotal for enabling efficient operation of hot carrier devices. Clarifying the fundamental role of plasmon excitation is therefore critical for exploiting their full potential. Here, we measure the internal quantum efficiency in photoexcited gold (Au)-gallium nitride (GaN) Schottky diodes to elucidate and quantify the distinct roles of surface plasmon excitation, hot carrier transport, and carrier injection in device performance. We show that plasmon excitation does not influence the electronic processes occurring within the hot carrier device. Instead, the metal band structure and carrier trans

SUBMITTER: Tagliabue G 

PROVIDER: S-EPMC6107582 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature