Alternate identifier:
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Related identifier:
(Is Supplement To) 10.1002/adma.202307553 - DOI
Creator/Author:
Chen, Yi https://orcid.org/0000-0002-6614-976X [Karlsruhe Institute of Technology]

Groß, Michael https://orcid.org/0000-0003-2611-4172 [Karlsruhe Institute of Technology]

Schneider, Jonathan https://orcid.org/0009-0000-5707-7189 [Karlsruhe Institute of Technology]
Contributors:
-
Title:
Dispersion Engineering by Hybridizing the Back-Folded Soft Mode of Monomode Elastic Metamaterials with Stiff Acoustic Modes
Additional titles:
-
Description:
(Abstract) In many cases, the hybridization of two or more excitation modes in solids has led to new and useful dispersion relations of waves. Well-studied examples are phonon polaritons, plasmon polaritons, particle-plasmon polaritons, cavity polaritons, and magnetic resonances at optical frequencies. In all of these cases, the lowest propagating mode couples to a finite-frequency localized resonance. Herein, the unusual metamaterial phonon dispersion relations arising from the hybridization of an ordinary acoustical phonon mode with a back-folded soft or easy phonon mode of a monomode elastic metamaterial are discussed. Conceptually, the single easy mode can have strictly zero wave velocity. In reality, its wave velocity is very much smaller than that of all other modes. Considering polymeric 3D printed elastic monomode metamaterials at ultrasound frequencies, it is shown theoretically and experimentally that the resulting pronounced avoided crossing, with a frequency splitting comparable to the mid-frequency, leads to backward-wave behavior for the lowest band over a broad frequency range, conceptually at zero loss.
Keywords:
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Related information:
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Language:
-
Publishers:
Karlsruhe Institute of Technology
Production year:
Subject areas:
Physics
Materials Science
Engineering
Resource type:
Collection
Data source:
-
Software used:
Resource production
Software:
Comsol - 5.5
Alternative software:
MATLAB - 2022b
Software used:
Resource processing
Software:
MATLAB - 2022b
Alternative software:
-
Data processing:
-
Publication year:
Rights holders:
KIT
Funding:
Deutsche Forschungsgemeinschaft (DFG) - (3D Matter Made to Order (3DMM2O)) EXC 2082 - 390761711
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2023-10-02
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