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Date
2020-03Type
- Report
ETH Bibliography
yes
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Abstract
When sources of energy gain and loss are introduced to a wave scattering system, the underlying mathematical formulation will be non-Hermitian. This paves the way for the existence of exceptional points, whereby eigenmodes are linearly dependent. The main goal of this work is to study the existence and consequences of exceptional points in the setting of high-contrast subwavelength metamaterials. We begin by studying a system of two parity--time-symmetric subwavelength resonators and prove that this system supports exceptional points. Using homogenization theory, we study a large ensemble of resonators and show that this behaviour can be replicated at the macroscale. Finally, we study a metascreen of subwavelength resonators and prove that there are frequencies at which this system exhibits unidirectional reflectionless transmission. Show more
Publication status
publishedExternal links
Journal / series
SAM Research ReportVolume
Publisher
Seminar for Applied Mathematics, ETH ZurichSubject
PT-symmetry; Exceptional points; Subwavelength resonance; Metamaterials; Unidirectional transmission; HomogenizationOrganisational unit
09504 - Ammari, Habib / Ammari, Habib
Related publications and datasets
Is previous version of: http://hdl.handle.net/20.500.11850/587445
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ETH Bibliography
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