Optical image processing with metasurface dark modes

Roberts, A, Gomez, D and Davis, T 2018, 'Optical image processing with metasurface dark modes', Journal of the Optical Society of America A: Optics and Image Science, and Vision, vol. 35, no. 9, pp. 1575-1584.


Document type: Journal Article
Collection: Journal Articles

Title Optical image processing with metasurface dark modes
Author(s) Roberts, A
Gomez, D
Davis, T
Year 2018
Journal name Journal of the Optical Society of America A: Optics and Image Science, and Vision
Volume number 35
Issue number 9
Start page 1575
End page 1584
Total pages 10
Publisher Optical Society of America
Abstract Here we consider image processing using the optical modes of metasurfaces with an angle-dependent excitation. These spatially dispersive modes can be used to directly manipulate the spatial frequency content of an incident field, suggesting their use as ultra-compact alternatives for analog optical information processing. A general framework for describing the filtering process in terms of the optical transfer functions is provided. In the case where the relevant mode cannot be excited with a normally incident plane wave (a dark mode), high-pass filtering is obtained. We provide examples demonstrating filtering of both amplitude and pure phase objects.
Subject Physical Chemistry of Materials
Nanofabrication, Growth and Self Assembly
Nanomaterials
DOI - identifier 10.1364/JOSAA.35.001575
Copyright notice © 2018 Optical Society of America
ISSN 1084-7529
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