Alexander O. Govorov - CINBIO Seminar Programme 26 xullo 2023 Seminarios, Torre CACTI
O 26 de xullo de 2023, Alexander O. Govorov (Department of Physics and Astronomy, Ohio University, Athens, USA) ofrecerá o seminario Photonic Metastructures and Bio-Assemblies: Chirality, DNA-origami, and hot electrons.
Será ás 11:00h na Sala de Seminarios da Torre CACTI.
Plasmonic nanostructures and metamaterials are very efficient at the absorption and scattering of light. The studies to be presented in this talk concern special designs of hybrid nanostructures with electromagnetic hot spots, where the electromagnetic field becomes strongly enhanced and spatially concentrated. Overall, plasmonic nanostructures with hot spots demonstrate strongly amplified optical and energy-related effects, and this talk will review some of such phenomena. (1) Using nanoparticle arrays made of different metals, one can transfer plasmonic signals coherently and with minimal losses . (2) Plasmonic hot spots efficiently generate energetic electrons, which can be used for photochemistry and photodetection [2,3,4]. (3) Nanostructures with small interparticle gaps can strongly enhance heat's optical generation and confine high photo-temperatures in small volumes [5,6,7]. (4) Colloidal nanocrystal assemblies and metastructures with plasmon resonances allow us to strongly enhance the chiral optical responses (circular dichroism) of biomolecules and to induce chiral photo-chemical effects [8,9,10,11,12].
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