6 September 2017 Anomalous refraction of infrared waves through ultrathin all dielectric metasurfaces
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Abstract
A multipeak Metasurfaces are the two dimensional equivalents of bulk metamaterials [1, 2], which represent a sudden variation of optical properties when an incident wave interacts with it, yielding the most exotic optical phenomena, such as broadband absorption, wavefront shaping or the anomalous refraction and reflection. This paper proposes, through simulations, a model of a purely dielectric metasurface without losses, allowing the incident wave’s global phase control, from - π to π, for operation on optical frequencies (1.55 μm) by inserting structures that have contrasting refractive indexes. To demonstrate the phase control, a linear phase profile has been utilized to cause the anomalous refraction phenomena, which has applications in wireless optical communications.
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R. A. Vieira, T. F. Simões de Castro , V. F. Rodriguez-Esquerre, "Anomalous refraction of infrared waves through ultrathin all dielectric metasurfaces", Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 1034339 (6 September 2017); doi: 10.1117/12.2292471; https://doi.org/10.1117/12.2292471
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