Cloaking and magnifying using radial anisotropy
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Journal of Applied Physics, Volume 114, issue 4, pp. 1-9
Abstract
This paper studies the electrostatic responses of a polarly radially anisotropic cylinder and a spherically radially anisotropic sphere. For both geometries, the permittivity components differ from each other in the radial and tangential directions. We show that choosing the ratio between these components in a certain way, these rather simple structures can be used in cloaking dielectric inclusions with arbitrary permittivity and shape in the quasi-static limit. For an ideal cloak, the contrast between the permittivity components has to tend to infinity. However, only positive permittivity values are required and a notable cloaking effect can already be observed with relatively moderate permittivity contrasts. Furthermore, we show that the polarly anisotropic cylindrical shell has a complementary capability of magnifying the response of an inner cylinder.Description
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Kettunen, H, Wallén, H & Sihvola, A 2013, 'Cloaking and magnifying using radial anisotropy', Journal of Applied Physics, vol. 114, no. 4, 044110, pp. 1-9. https://doi.org/10.1063/1.4816797