Nanoplasmonics in hybrid fibers
Level 6 Geoff Opat Seminar Room
David Caro Building
Recent rapid progress in nanophotonics has been driven by the ability to integrate photonic devices with nanostructures of ever-increasing sophistication and incorporate a variety of materials on the nanoscale. In parallel, optical fibers have played a key role in the technological boom of the past decades, but their functionality has remained limited. Most recently, hybrid optical fibers have provided apathway to achieve high-performing fibers, through the integration of large-aspect-ratio nanowires of different materials within them, such as metals, semiconductors, nonlinear glasses, or even liquids. A variety of pre- and post- processing techniques can be employed, including modified vapour deposition, direct fiber drawing, and pressure-assisted melt filling, providing specifically tailored functionality beyond that of simple glass fibres. Applications span numerous fields, including plasmonics, metamaterials, near-field and on linear optics, and biosensing. In this talk I will review some of the recent experimental progress in hybrid fibers, with a specific focus on plasmonic step-index fibers which possess gold nanowires in the core or cladding. These form a simple and monolithic fiber platform, which can either be used as an efficient near-field probe, a single-mode nonlinear plasmonic waveguide, or a plug-and-play broadband polarizer. In the final part of my talk I will discuss some recent progress in the design of ultra-compact hybrid-plasmonic nonlinear waveguides at the Australian Institute for Nanoscale Science and Technology (AINST).
Dr Alessandro Tuniz, University of Sydney
Dr Alessandro Tuniz
University of Sydney
Dr Alessandro Tuniz is a University of Sydney Postdoctoral Fellow at the Australian Institute for Nanoscale Science and Technology (AINST), working on nonlinear hybrid plasmonics in the Nanophotonics Advancement Lab. In 2014 he received a Humboldt Postdoctoral Fellowship to work at the Leibniz Institute of Photonic Technology in Jena, where he worked on integrating active and passive plasmonic functionality into hybrid optical fibers. He completed his PhD at the University of Sydney in 2013 on the topic of terahertz fiber metamaterials. His research interests are in plasmonics, metamaterials, subwavelength imaging, and nonlinear optics, including both experimental and numerical simulation techniques.