16 September 2016 Controlling the evanescent waves using metamaterials
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In this paper we discuss the role of evanescent waves in nanophotonic devices, especially in metamaterials. We discuss how metamaterial cladding increases the power confinement in waveguides by increasing the momentum of evanescent waves. The momentum of evanescent waves is controlled in such a fashion that condition of total internal reflection is not disturbed. This becomes possible by making the cladding anisotropic. Anisotropic cladding gives the facility to control the parallel and perpendicular components of wave vector individually. We analyze the efficiency of this technique in case of waveguides. We have also discussed the advantages of collecting evanescent waves for imaging sub wavelength objects.
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Nishant Shankhwar, Nishant Shankhwar, Ravindra Kumar Sinha, Ravindra Kumar Sinha, Yogita Kalra, Yogita Kalra, "Controlling the evanescent waves using metamaterials", Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99182J (16 September 2016); doi: 10.1117/12.2237261; https://doi.org/10.1117/12.2237261

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