Dr. Dionne's research investigates metamaterials - engineered materials with optical and electrical properties not found in nature. She is especially interested in plasmonic and colloidal nanocrystal-based metamaterials, including their fundamental electrodynamic properties and applications to solar energy and bioimaging. Active research areas in her group include visible-frequency metamaterials for subwavelength light manipulation, enhanced photovoltaics and photocatalysis, and active neuronal imaging.