Abstract

We investigate three cases of metamaterials presented in the literature displaying refractive index with one or more discontinuities along the frequency spectrum. We reproduce the numerical simulations of these metamaterials and compare our simulations to each reported case. For each case, we perform a geometrical investigation of each metamaterial’s refractive index by mean of a numerical simulation of a prism made of the reported metamaterials upon which is incident a plane electromagnetic wave. Such investigation allows us to infirm or confirm negative refraction at resonance frequency. Finally, we carry a numerical and theoretical investigation of this discontinuity and show that, as the refractive index crosses a discontinuity, while the topology of the effective wave has changed within the metamaterial, the dynamics of the phases remain unchanged at any time at the metamaterial's boundaries.

Details

Title
Three cases of discontinuous refractive index in metamaterial study
Author
Wegrowski Antoine 1 ; Wang, Wei-Chih 2 ; Tsui Chileung 3 

 University of Washington, Department of Mechanical Engineering, Seattle, USA (GRID:grid.34477.33) (ISNI:0000000122986657) 
 University of Washington, Department of Mechanical Engineering, Seattle, USA (GRID:grid.34477.33) (ISNI:0000000122986657); University of Washington, Department of Electrical Engineering, Seattle, USA (GRID:grid.34477.33) (ISNI:0000000122986657); National Tsing Hua University, Department of Power Mechanical Engineering, Hsinchu, Taiwan, ROC (GRID:grid.38348.34) (ISNI:0000 0004 0532 0580); National Tsing Hua University, Institute of Nano Engineering and Microsystems, Hsinchu, Taiwan, ROC (GRID:grid.38348.34) (ISNI:0000 0004 0532 0580) 
 University of Washington, Department of Electrical Engineering, Seattle, USA (GRID:grid.34477.33) (ISNI:0000000122986657) 
Publication year
2022
Publication date
2022
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2635340193
Copyright
© The Author(s) 2022. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.