Broadband High-Efficiency Chiral Splitters and Holograms from Dielectric Nanoarc Metasurfaces

Wang, D, Hwang, Y, Dai, Y, Si, G, Wei, S, Choi, D, Gomez, D, Mitchell, A, Lin, J and Yuan, X 2019, 'Broadband High-Efficiency Chiral Splitters and Holograms from Dielectric Nanoarc Metasurfaces', Small, vol. 15, no. 20, pp. 1-8.


Document type: Journal Article
Collection: Journal Articles

Title Broadband High-Efficiency Chiral Splitters and Holograms from Dielectric Nanoarc Metasurfaces
Author(s) Wang, D
Hwang, Y
Dai, Y
Si, G
Wei, S
Choi, D
Gomez, D
Mitchell, A
Lin, J
Yuan, X
Year 2019
Journal name Small
Volume number 15
Issue number 20
Start page 1
End page 8
Total pages 8
Publisher Wiley
Abstract Simultaneous broadband and high efficiency merits of designer metasurfaces are currently attracting widespread attention in the field of nanophotonics. However, contemporary metasurfaces rarely achieve both advantages simultaneously. For the category of transmissive metadevices, plasmonic or conventional dielectric metasurfaces are viable for either broadband operation with relatively low efficiency or high efficiency at only a selection of wavelengths. To overcome this limitation, dielectric nanoarcs are proposed as a means to accomplish two advantages. Continuous nanoarcs support different electromagnetic resonant modes at localized areas for generating phase retardation. Meanwhile, the geometric nature of nanoarc curvature endows the nanoarcs with full phase coverage of 02π due to the PancharatnamBerry phase principle. Experimentally incorporated with the chiral-detour phase principle, a few compelling functionalities are demonstrated, such as chiral beamsplitting, broadband holography, and helicity-selective holography. The continuous nanoarc metasurfaces prevail over plasmonic or dielectric discretized building block strategies and the findings lead to novel designs of spin-controllable metadevices.
Subject Nanomaterials
Nanofabrication, Growth and Self Assembly
Physical Chemistry of Materials
Keyword(s) chiral beamsplitting
chiral-detour phase
dielectric metasurfaces
holograms
PancharatnamBerry (PB) phase
DOI - identifier 10.1002/smll.201900483
Copyright notice © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN 1613-6810
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