School of Physics - Research Publications

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Plasmonic Metasurfaces for Optical Information Processing

Wesemann, L ; Panchenko, E ; Singh, K ; Gomez, DE ; Davis, TJ ; Roberts, A ; Simpson, MC ; Juodkazis, S (SPIE-INT SOC OPTICAL ENGINEERING, 2019-01-01)

Optical spatial frequency filtering is a key method for information processing in biological and technical imaging. While conventional approaches rely on bulky components to access and filter the Fourier plane content of a wavefield, nanophotonic approaches for spatial frequency filtering have recently gained attention. Here computational and experimental progress towards the design and demonstration of metasurfaces with spatial frequency filtering capability for optical image processing will be presented. Using the example of a metasurface consisting of radial rod trimers we demonstrate its potential to perform edge enhancement in an amplitude image and conversion of phase gradients in a wavefield into intensity modulations. The presented results indicate a potential avenue for ultra-compact image processing devices with applications in biological live-cell imaging.