Demetriadou, A

Kornyshev, A

English

Spiral - Imperial College Digital Repository

Contribution submission to the conference Regensburg 2016Principles of plamonic imaging — ∙Angela Demetriadou1 andAlexei Kornyshev2 — 1Blackett Laboratory, Imperial College Lon-don, Prince Consort Road, SW7 2AZ, London, United Kingdom —2Department of Chemistry, Imperial College London, Prince ConsortRoad, SW7 2AZ, London, United KingdomPlasmonic imaging exploits the evanescent nature of propagating sur-face plasmon polariton (SPP) waves to produce real-time images ofsub-wavelength objects with high-precision. It is commonly used in bi-ological sciences to track and image organelles in cells, such as DNA,mitochondria and virus molecules. The fast dynamics of intra-cellularprocesses enforce to keep the cells under their native state (i.e. label-free) and to be imaged in real-time, establishing plasmonic imaging asa powerful tool for mapping and understanding cellular behaviour. Ad-ditionally, it has been widely used to map the electro-catalytic activityof single nanoparticles with high spatial resolution and sensitivity.Our theoretical model describes the electromagnetic process thatforms the plasmonic image, and accurately predicts the image prop-erties for particles of any composition and size. The intensity andshape of the plasmonic image is dominated by the SPP-induced naturalmodes. Hence, through the theoretical model, spectroscopic informa-tion can be extracted from recorded plasmonic images, expanding thecapabilities of current plasmonic imaging techniques.Part: OType: Hauptvortrag;Invited TalkTopic: Nanostructures at surfaces: Dots,particles, clustersEmail: a.demetriadou06@imperial.ac.uk

Principles of plasmonic imaging

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Principles of plasmonic imaging

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