Controlling the evanescent waves using metamaterials

Nishant Shankhwar; Ravindra Kumar Sinha; Yogita Kalra

doi:10.1117/12.2237261

16 September 2016 Controlling the evanescent waves using metamaterials

Nishant Shankhwar, Ravindra Kumar Sinha, Yogita Kalra

Proceedings Volume 9918, Metamaterials, Metadevices, and Metasystems 2016; 99182J (2016) https://doi.org/10.1117/12.2237261
Event: SPIE Nanoscience + Engineering, 2016, San Diego, California, United States

Abstract

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.

Citation Download Citation

Nishant Shankhwar, Ravindra Kumar Sinha, and Yogita Kalra "Controlling the evanescent waves using metamaterials", Proc. SPIE 9918, Metamaterials, Metadevices, and Metasystems 2016, 99182J (16 September 2016); https://doi.org/10.1117/12.2237261

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