Metamaterials designed for enhanced ENZ properties. (17th September 2020)

• Record Type: Journal Article
• Authors: Koivurova, Matias; Hakala, Tommi; Turunen, Jari; Friberg, Ari T; Ornigotti, Marco; Caglayan, Humeyra
• Is Part Of: New journal of physics. Volume 22:Number 9(2020:Sep.)
• Publication Date: 2020-09-17
• Subjects: epsilon-near-zero -- metamaterial -- multilayer structure; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/abb387
• Languages: English
• ISSNs: 1367-2630

Abstract

Abstract: We examine layered metamaterial structures consisting of alternating films of epsilon-near-zero (ENZ) and dielectric material, and show that for such a stack it is possible to enhance the refractive, reflective or absorptive properties of the ENZ. The proposed structure takes advantage of resonances from several interfaces, guided modes, and plasmon excitations to achieve the desired enhancement, and it is not an effective medium. We use analytical modeling tools to show how the different degrees of freedom affect the properties of the stack, and propose experimentally feasible parameters for such structures.