Carpet cloak with graded dielectric metasurface (Presentation Recording)

LiYi Hsu; Thomas Lepetit; Boubacar Kante

doi:10.1117/12.2188613

5 October 2015 Carpet cloak with graded dielectric metasurface (Presentation Recording)

LiYi Hsu, Thomas Lepetit, Boubacar Kante

Proceedings Volume 9544, Metamaterials, Metadevices, and Metasystems 2015; 95442G (2015) https://doi.org/10.1117/12.2188613
Event: SPIE Nanoscience + Engineering, 2015, San Diego, California, United States

Abstract

We demonstrate a method to hide a Gaussian-shaped bump on a ground plane from an incoming plane wave. In essence, we use a graded metasurface to shape the wavefronts like those of a flat ground plane[1,2].The metasurface provides additional phase to the electromagnetic field to control the reflection angle. To mimic a flat ground plane, the reflection angle is chosen to be equal to the incident angle. The desired phase distribution is calculated based on generalized Snell’s laws[3]. We design our metasurface in the microwave range using sub-wavelength dielectric resonators. We verify the design by full-wave time-domain simulations and show that the result matches our theory well. This approach can be applied to hide any object on a ground plane not only at microwave frequencies but also at higher frequencies up to the infrared. 1. Jensen Li and J. B. Pendry, Hiding under the Carpet: A New Strategy for Cloaking. Phys. Rev. Lett. 101, 203901 (2008) 2. Andrea Alu, Mantle cloak: Invisibility induced by a surface. Phys. Rev. B 80, 245115 (2009) 3. Yu N, et al. Light propagation with phase discontinuities: Generalized laws of reflection and refraction. Science 334(6054):333–337 (2011)

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LiYi Hsu, Thomas Lepetit, and Boubacar Kante "Carpet cloak with graded dielectric metasurface (Presentation Recording)", Proc. SPIE 9544, Metamaterials, Metadevices, and Metasystems 2015, 95442G (5 October 2015); https://doi.org/10.1117/12.2188613

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KEYWORDS

Dielectrics

Reflection

Microwave radiation

Electromagnetism

Infrared radiation

Lithium

Radio propagation

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