Negative index metamaterials

Negative index metamaterials are materials that have a refractive index with a negative value, which can be achieved through two distinct methods in the microwave regime. Among these materials are left-handed transmission lines (LHTLs), which mimic a backward-wave regime and have practical applications.From: Theory and Phenomena of Metamaterials [2017], On the wave transmission in a discrete nonlinear left-handed electrical lattice [2022]

Fabrication and Optical Characterization of Photonic Metamaterials

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Published in Filippo Capolino, Applications of Metamaterials, 2017

Stefan Linden, Martin Wegener

Recently, we have also fabricated negative-index metamaterials with up to three functional layers [DWL07]. The silver-based samples are again fabricated by standard EBL and a liftoff procedure. The measured performance is close to theory and in that the retrieved optical parameters do not change too much with the number of functional layers (not shown).

A programmable digital metasurface structure designed using ANN technique

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Published in International Journal of Electronics, 2023

Gizem Altıntarla, Emin Ünal, Olcay Altıntaş, Duygu N. Gençoğlan, Şule Çolak, Amir H. Nazeri, Fatih Özkan Alkurt, Muharrem Karaaslan

In recent years, negative index metamaterials have become a remarkable topic in antenna engineering applications (Benayad & Tellache, 2019; Cicchetti et al., 2017; Islam et al., 2019; Konstantinidis & Feresidis, 2015; Safari Dehnavi et al., 2019; Saraswat & Kumar, 2019). Metasurface structures play an indispensable role in antenna design due to their functional advantages (Ashoor & Ramahi, 2019; M. Chen et al., 2019; W. Chen et al., 2017; Hou et al., 2019; Liu & Cui, 2016; Nasrollahi et al., 2018; Safari Dehnavi et al., 2019; Singh et al., 2019; La Spada, 2019; Ünal & Altıntarla, 2019). In Safari Dehnavi et al., (2019), the metamaterial surface is used as superstrate to enhance antenna characteristics. In M. Chen et al., (2019), Huygens’ metasurface structure

Negative index metamaterials

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Fabrication and Optical Characterization of Photonic Metamaterials

A programmable digital metasurface structure designed using ANN technique