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Plasmonics and nanophotonics III

14:55 : Evolution of plasmon modes in the effective permittivity of polygonal arrays

Matthew D. Arnold, Angelo Garruzzo, Michael B. Cortie

University of Technology Sydney (Australia)

We investigate the effective permittivity of arrays of columns with polygonal cross-section, including regular tessellations of triangles, squares and hexagons. The evolution of the resonant positions and strengths is determined as a function of the fill factor. Complicated mode interactions at moderate fill factor are observed, and we explore the possibilities of manipulating the modes by additional variations to the shape variations.
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15:10 : Giant ultrafast hot electron response in plasmonic nanostructures

Hayk Harutyunyan (1),Alex B. F. Martinson (2),Larousse K. Khorashad (3),Alexander O. Govorov (3),Gary P. Wiederrecht (2)

(1)Emory University (USA) , (2)Argonne National Laboratory (USA) , (3)Ohio University (USA)

The strong dependence of the optical properties of nanoparticles on size and shape is a foundation of nanophotonics. In this paper we show how the time-resolved optical responses of hybrid plasmonic nanostructures can be controlled and modified in an unprecedented manner.
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15:25 : Polaritonics: Optical diodes and photonic circuits

Tania Espinosa Ortega (1),Ivan Shelykh (2),Timothy Liew (1)

(1)Nanyang Technological University (Singapore) , (2)University of Iceland (Iceland)

We present theoretically three devices based in exciton polaritons, namely, an optical diode, a complete photonic logic gate architecture and an implementation for hardware neural networks: a perceptron.
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15:40 : Novel plasmonic near-field transducer and coupling arrangement for heat-assisted magnetic recording

Jacek Gosciniak (1),Marcus Mooney (2),Mark Gubbins (2),Brian Corbett (1)

(1)Tyndall National Institute (Ireland) , (2)Springtown Industrial Estate (Ireland)

The efficiency of novel near-field plasmonic transducer designs, as can be used in heat-assisted magnetic recording systems, are analyzed with simulations performed using the finite-element method (FEM). The investigated transducer shows a five-fold improvement in terms of the electric field enhancement while achieving a spot size of 20-30nm and a ratio between the hotspot and side-lobe which exceed 36 which is at least 8 times higher compared to the lollipop transducer.
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