Scattering characteristics of a metasurface covered chiral sphere - Archive ouverte HAL
Article Dans Une Revue Applied optics Année : 2020

Scattering characteristics of a metasurface covered chiral sphere

Résumé

An analysis of the scattering characteristics of a chiral sphere covered with a metasurface is presented. The electro- magnetic fields inside and outside of a metasurface covered chiral sphere are expanded in terms of spherical vector wave functions. The influences of chirality and surface impedance of a metasurface upon the scattering cross sec- tion are investigated. It is seen that a specific type of metasurface can be used to significantly enhance and dimin- ish the back scattering cross section from a chiral sphere having a fixed value of chirality but different radii. It is also observed that a chiral sphere having chirality close to unity apparently cannot be cloaked using a lossless metasur- face as compared to a dielectric sphere, both having the same electromagnetic and geometrical parameters. A com- parative study of the scattering characteristics of metasurface covered realistic chiral and low-loss Teflon dielectric spheres is developed. It is found that a metasurface covered realistic chiral sphere can be used to significantly reduce the scattering as compared to scattering from a metasurface covered Teflon sphere at a specific angle, provided that both spheres have the same radii and surface reactance.
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Dates et versions

hal-02926341 , version 1 (31-08-2020)

Identifiants

Citer

Zeeshan Akbar Awan, Divitha Seetharamdoo. Scattering characteristics of a metasurface covered chiral sphere. Applied optics, 2020, (59), p. 5670-5679. ⟨10.1364/AO.392709⟩. ⟨hal-02926341⟩
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