Spatially and spectrally engineered spin-orbit interaction for achromatic virtual shaping

The geometries of objects are deterministic in electromagnetic phenomena in all aspects of our world, ranging from imaging with spherical eyes to stealth aircraft with bizarre shapes. Nevertheless, shaping the physical geometry is often undesired owing to other physical constraints such as aero- and...

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Bibliographic Details
Published in:Scientific reports 2015-05, Vol.5 (1), p.9822-9822, Article 9822
Main Authors: Pu, Mingbo, Zhao, Zeyu, Wang, Yanqin, Li, Xiong, Ma, Xiaoliang, Hu, Chenggang, Wang, Changtao, Huang, Cheng, Luo, Xiangang
Format: Article
Language:English
Subjects:
119/118
639/301/1019
639/301/1019/1015
639/624/399
639/925/357
Aircraft
Bandwidths
Camouflage
Design
Holography
Humanities and Social Sciences
multidisciplinary
Optics
Phase shift
Science
Simulation
Wavelengths
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Summary:The geometries of objects are deterministic in electromagnetic phenomena in all aspects of our world, ranging from imaging with spherical eyes to stealth aircraft with bizarre shapes. Nevertheless, shaping the physical geometry is often undesired owing to other physical constraints such as aero- and hydro-dynamics in the stealth technology. Here we demonstrate that it is possible to change the traditional law of reflection as well as the electromagnetic characters without altering the physical shape, by utilizing the achromatic phase shift stemming from spin-orbit interaction in ultrathin space-variant and spectrally engineered metasurfaces. The proposal is validated by full-wave simulations and experimental characterization in optical wavelengths ranging from 600 nm to 2800 nm and microwave frequencies in 8-16 GHz, with echo reflectance less than 10% in the whole range. The virtual shaping as well as the revised law of reflection may serve as a versatile tool in many realms, including broadband and conformal camouflage and Kinoform holography, to name just a few.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep09822