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Information × Registration Number 2116U002631, Article popup.category Thesis Title popup.author popup.publication 01-01-2016 popup.source_user Сумський державний університет popup.source http://essuir.sumdu.edu.ua/handle/123456789/46869 popup.publisher Sumy State University Description Metamaterials make a wide class of artificial composites, characterized by features that are hardly achievable technologically and unattainable in nature materials. These features, such as negative group velocity of EM wave and thus refraction index, are obtained due to simultaneously negative effective permittivity and permeability. The major classes of these composites are single negative materials (SNG), double negative materials (DNG), and electronic bandgap materials (EBG) or photonic crystals [1]. Permittivity and permeability depend on frequency, so there are RF MTMs (including microwave), terahertz, optical etc. popup.nrat_date 2025-05-12 Close