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Proceedings Paper

Flat and conformal optics using dielectric metasurfaces (Conference Presentation)
Author(s): Andrei Faraon

Paper Abstract

Flat optical devices based on lithographically patterned sub-wavelength dielectric nano-structures provide precise control over optical wavefronts, and thus promise to revolutionize the field of free-space optics. I discuss our work on high contrast transmitarrays and reflectarrays composed of silicon nano-posts located on top of low index substrates like silica glass or transparent polymers. Complete control of both phase and polarization is achieved at the level of single nano-post, which enables control of the optical wavefront with sub-wavelength spatial resolution. Using this nano-post platform, we demonstrate lenses, waveplates, polarizers, arbitrary beam splitters and holograms. Devices that provide multiple functionalities, like simultaneous polarization beam splitting and focusing are implemented. By embedding the metasurfaces in flexible substrates, conformal optical devices that decouple the geometrical shape and optical function are shown. Multiple flat optical elements are integrated in optical systems such as planar retro-reflectors and Fourier lens systems with applications in ultra-compact imaging systems. Applications in microscopy and the prospects for tunable devices are discussed.

Paper Details

Date Published: 28 April 2017
PDF: 1 pages
Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 101120L (28 April 2017); doi: 10.1117/12.2258236
Show Author Affiliations
Andrei Faraon, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 10112:
Photonic and Phononic Properties of Engineered Nanostructures VII
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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