Angle-selective all-dielectric Huygens' metasurfaces

Arslan D, Chong KE, Miroshnichenko AE, Choi DY, Neshev DN, Pertsch T, Kivshar YS, Staude I (2017)

Publication Type: Journal article

Publication year: 2017

Journal

Journal of Physics D: Applied Physics IOP Publishing: Hybrid Open Access

Book Volume: 50

Article Number: 434002

Journal Issue: 43

DOI: 10.1088/1361-6463/aa875c

Abstract

We experimentally and numerically study the angularly resolved transmission properties of dielectric metasurfaces consisting of silicon nanodisks which support electric and magnetic dipolar Mie-type resonances in the near-infrared spectral range. First, we concentrate on Huygens metasurfaces which are characterised by a spectral overlap of the fundamental electric and magnetic dipole resonances of the silicon nanodisks at normal incidence. Huygens metasurfaces exhibit a high transmitted intensity over the spectral width of the resonances due to impedance matching, while the transmitted phase shows a variation of 2π as the wavelength is swept across the width of the resonances. We observe that the transmittance of the Huygens metasurfaces depends on the incidence angle and is sensitive to polarization for non-normal incidence. As the incidence angle is increased starting from normal incidence, the two dipole resonances are shifted out of the spectral overlap and the resonant features appear as pronounced transmittance minima. Next, we consider a metasurface with an increased nanodisk radius as compared to the Huygens metasurface, which supports spectrally separate electric and magnetic dipole resonances at normal incidence. We show that for TM polarisation, we can shift the resonances of this metasurface into spectral overlap and regain the high resonant transmittance characteristic of Huygens metasurfaces at a particular incidence angle. Furthermore, both metasurfaces are demonstrated to reject all TM polarized light incident under angles other than the design overlap angle at their respective operation frequency. Our experimental observations are in good qualitative agreement with numerical calculations.

Involved external institutions

Friedrich-Schiller-Universität Jena DE Germany (DE) Australian National University (ANU) AU Australia (AU)

How to cite

APA:

Arslan, D., Chong, K.E., Miroshnichenko, A.E., Choi, D.-Y., Neshev, D.N., Pertsch, T.,... Staude, I. (2017). Angle-selective all-dielectric Huygens' metasurfaces. Journal of Physics D: Applied Physics, 50(43). https://doi.org/10.1088/1361-6463/aa875c

MLA:

Arslan, D., et al. "Angle-selective all-dielectric Huygens' metasurfaces." Journal of Physics D: Applied Physics 50.43 (2017).

BibTeX: Download