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Flat and conformal optics using dielectric metasurfaces

Faraon, Andrei (2017) Flat and conformal optics using dielectric metasurfaces. In: Photonic and Phononic Properties of Engineered Nanostructures VII. Proceedings of SPIE. No.10112. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 101120L. ISBN 9781510606654.

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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.

Item Type:Book Section
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Faraon, Andrei0000-0002-8141-391X
Additional Information:© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE).
Series Name:Proceedings of SPIE
Issue or Number:10112
Record Number:CaltechAUTHORS:20180628-154639682
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Official Citation:Andrei Faraon, "Flat and conformal optics using dielectric metasurfaces (Conference Presentation)", Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 101120L (28 April 2017); doi: 10.1117/12.2258236;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87457
Deposited By: George Porter
Deposited On:29 Jun 2018 14:36
Last Modified:15 Nov 2021 20:48

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