2018/09/18 by Wei Wang, Bernard Bonello, Wang, Wei +7
Engineering · #Applied Physics (physics.app-ph) #FOS: Physical sciences #Railway Engineering and Dynamics #Structural Analysis and Optimization #Vibration and Dynamic Analysis
paper · pdf · doi:10.48550/arxiv.1809.06771
openalex publication_date 2018/09/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We report the realization of simultaneously negative effective mass density and shear modulus in a single-phase asymmetric double-sided pillared metamaterial. The negative effective mass density is achieved by the combination of bending and compressional resonances of one pillar whereas the rotational resonance of the other pillar leads to the negative effective shear modulus. The coupling between these two pillars is investigated to describe the formation of the doubly negative property. Then, a pillared system featuring chirality is designed in order to make efficient the excitation of the rotational vibration, the occurrence of which is demonstrated by the transmission spectrum. Finally, numerical simulations of the zero-index refraction are carried out to prove the occurrence of the doubly negative property.