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non-Hermitian materials

Ramathasan Thevamaran's picture

Universal route for the emergence of exceptional points in PT-symmetric metamaterials with unfolding spectral symmetries

Sat, 2021-07-03 13:30 - Ramathasan Thev...
research
metamaterials
Parity-Time symmetry
non-Hermitian materials
Exceptional points
fractal materials
elastodynamics

We introduce a class of parity-time symmetric elastodynamic metamaterials (Ed-MetaMater) whose Hermitian counterpart exhibits unfolding (fractal) spectral symmetries. Our study reveals a scale-free formation of exceptional points in those Ed-MetaMaters whose density is dictated by the fractal dimension of their Hermitian spectra.

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Ramathasan Thevamaran's picture

Asymmetric acoustic energy transport in non-Hermitian metamaterials

Thu, 2019-08-08 14:30 - Ramathasan Thev...
research
acoustic waves
non-Hermitian materials
left–right asymmetry
Damping
acoustic metamaterials
acoustic-structural interaction

One of our studies on linear and nonlinear non-Hermitian metamaterials has been published on the recent special issue of the Journal of the Acoustical Society of America: Non-Reciprocal and Topological Wave Phenomena in Acoustics.

Abstract

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