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arXiv · 1603.05326

Broadband highly-efficient dielectric metadevices for polarization control

Sergey Kruk·Ben Hopkins·Ivan Kravchenko·Andrey Miroshnichenko·Dragomir N. Neshev·Yuri S. Kivshar
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Abstract

Metadevices based on dielectric nanostructured surfaces with both electric and magnetic Mie-type resonances have resulted in the best efficiency to date for functional flat optics with only one disadvantage: a narrow operational bandwidth. Here we experimentally demonstrate broadband transparent all-dielectric metasurfaces for highly efficient polarization manipulation. We utilize the generalized Huygens principle, with a superposition of the scattering contributions from several electric and magnetic multipolar modes of the constituent meta-atoms, to achieve destructive interference in reflection over a large spectral bandwidth. By employing this novel concept, we demonstrate reflectionless (~90% transmission) half-wave plates, quarter-wave plates, and vector beam q-plates that can operate across multiple telecom bands with ~99% polarization conversion efficiency.

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Sergey Kruk, Ben Hopkins, Ivan Kravchenko, Andrey Miroshnichenko, Dragomir N. Neshev, Yuri S. Kivshar. 2016-03-17. Broadband highly-efficient dielectric metadevices for polarization control. https://arxiv.org/abs/1603.05326

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