The scientific aim of this project was to test the hypothesis that high-speed photodetectors fabricated using GaAs/AlGaAs core-shell nanowires with plasmonic lenses integrated into the contacts could show improved performance relative to conventional photodetectors. The rational for this experiment is that nanowires have been shown to have great potential for use as high-speed photodetectors, but the small cross-section of nanowires means that they are not very effective at capturing incoming light. Plasmonic lenses have been shown to be an effective means of focusing light below the diffraction limit, into areas commensurate with the diameter of a single nanowire. The plasmonic lenses were designed prior to the start of the project and the testing of the devices continues. For this, the PI traveled to the ANFF-NSW nanofabrication facility in Sydney, Australia to use the state of the art nanofabrication tools available there to fabricate devices using nanowires that he supplied. The additional aims of the project were to train the PI in these techniques and to foster connections between American and Australian researchers. A set of nanowire devices were fabricated in Australia and remain part of an ongoing experiment; so there are not yet any publicly reportable results. The training aspect of the project was successful in advancing the PI's skills in a number of nanofabrication techniques. These are used as well at his home institution where he was able to share the training with other researchers, working on a number of other projects. Also as a result of this project, the PI has met a number of potential collaborators for future projects.