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Magnified imaging based on non-Hermitian nonlocal cylindrical metasurfaces

Show simple item record Savoia, Silvio Valagiannopoulos, Constantinos A. Monticone, Francesco Castaldi, Giuseppe Galdi, Vincenzo Al`u, Andrea 2017-03-15T04:14:51Z 2017-03-15T04:14:51Z 2017
dc.identifier.citation Silvio Savoia, Constantinos A. Valagiannopoulos, Francesco Monticone, Giuseppe Castaldi, Vincenzo Galdi, and Andrea Al`u; 2017; Magnified imaging based on non-Hermitian nonlocal cylindrical metasurfaces; PHYSICAL REVIEW B. American Physical Society; ru_RU
dc.description.abstract We show that a cylindrical lensing system composed of two metasurfaces with suitably tailored non-Hermitian (i.e., with distributed gain and loss) and nonlocal (i.e., spatially dispersive) properties can perform magnified imaging with reduced aberrations. More specifically, we analytically derive the idealized surface-impedance values that are required for “perfect” magnification and imaging and elucidate the role and implications of non- Hermiticity and nonlocality in terms of spatial resolution and practical implementation. For a basic demonstration, we explore some proof-of-principle quasilocal and multilayered implementations and independently validate the outcomes via full-wave numerical simulations. We also show that the metasurface frequency-dispersion laws can be chosen so as to ensure unconditional stability with respect to arbitrary temporal excitations. These results, which extend previous studies on planar configurations, may open intriguing venues in the design of metastructures for field imaging and processing. ru_RU
dc.language.iso en ru_RU
dc.publisher PHYSICAL REVIEW B. American Physical Society ru_RU
dc.rights Attribution-NonCommercial-ShareAlike 3.0 United States *
dc.rights.uri *
dc.title Magnified imaging based on non-Hermitian nonlocal cylindrical metasurfaces ru_RU
dc.type Article ru_RU

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Attribution-NonCommercial-ShareAlike 3.0 United States Except where otherwise noted, this item's license is described as Attribution-NonCommercial-ShareAlike 3.0 United States