On effective electromagnetic parameters of artificial nanostructured magnetic materials

In this paper we discuss effective material parameter description of new nanostructures designed to perform as artificial magnetic materials for vis- ible light. Among these structures there are various split-ring resonators, dual-bar structures, fishnet layers and other geometries. Artificial magnetic response in these structures appears due to weak spatial dispersion effects, and it is important to study the conditions under which the magnetic re- sponse can be adequately measured with effective permeability tensor. On the examples of dual bars and split rings we show that this is possible only under some quite restrictive conditions. In the general case, more compli- cated constitutive relations with more effective material parameters need to be developed.Comment: 20 pages, 2 figure

THz Multiple-Beam Manipulation by Reconfigurable Intelligent Surface with Independent Phase/Amplitude Control

| openaire: EC/H2020/956256/EU//META WIRELESStOur paper presents a real-time design using a digital metasurface that can control both the amplitude and phase of reflected waves. Our suggested $VO_{2}-$based metasurface effectively manipulates both transverse electric (TE) and transverse magnetic (TM) reflected waves independently with angular stability up to 40° in the range (1.45-1.55) THz. We anticipate that such metasurfaces may be a good candidate for indoor wireless communication.Peer reviewe