The effect of electro-momentum coupling on unidirectional zero reflection in layered generalized Willis Metamaterials
- verfasst von
- Hai D. Huynh, S. S. Nanthakumar, Harold S. Park, Timon Rabczuk, Xiaoying Zhuang
- Abstract
Piezoelectric materials with asymmetric microstructures have emerged in elastodynamics as generalized Willis media to create an additional cross-coupling, termed electro-momentum coupling, which offers a new degree of freedom to manipulate mechanical waves. In this study, we present numerical simulations of the scattering of longitudinal waves in layered piezoelectric Willis metamaterials. Based on the asymmetry of reflection amplitudes due to the electro-momentum coupling, a topology optimization approach is employed to design a one-way zero reflection system with the introduction of material loss to control the asymmetric reflection amplitudes and embrace non-Hermitian physics. We conduct two topology optimization studies to design unit cells connected either with or without external electric control. The modeling of wave propagation shows the effects of both classical Willis coupling and electro-momentum coupling for each wave propagation study.
- Organisationseinheit(en)
-
Institut für Photonik
- Externe Organisation(en)
-
Boston University (BU)
Bauhaus-Universität Weimar
Tongji University
- Typ
- Artikel
- Journal
- Extreme Mechanics Letters
- Band
- 77
- Anzahl der Seiten
- 11
- Publikationsdatum
- 06.2025
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Bioengineering, Chemische Verfahrenstechnik (sonstige), Ingenieurwesen (sonstige), Werkstoffmechanik, Maschinenbau
- Elektronische Version(en)
-
https://doi.org/10.1016/j.eml.2025.102318 (Zugang:
Geschlossen)
