Bidirectional elastic diode with frequency-preserved nonreciprocity

Abstract

The study of nonreciprocal wave propagation is of great interests for both fundamental research and engineering applications. Here we demonstrate theoretically and experimentally a bidirectional, nonreciprocal, and high-quality diode that can rectify elastic waves in both forward and backward directions in an elastic metamaterial designed to exhibit enhanced nonlinearity of resonances. This diode can preserve or vary frequency, rectify low-frequency long wave with small system size, offer high-quality insulation, can be modulated by amplitude, and break reciprocity of both the total energy and fundamental wave. We report three mechanisms to break reciprocity: the amplitude-dependent bandgap combining interface reflection, chaotic response combining linear bandgap, amplitude-dependent attenuation rate in damping diode. The bidirectional diode paves ways for mutually controlling information/energy transport between two sources, which can be used as new wave insulators.

arXiv comment11 pages, 13 figures

References in corpus (15)

• Phononics: Manipulating heat flow with electronic analogs and beyond
• Thermal diode: Rectification of heat flux
• Topological negative refraction of surface acoustic waves in a Weyl phononic crystal
• Anomalous wave reflection from the interface of two strongly nonlinear granular media
• Non-Reciprocal Wave Propagation in Spatiotemporal Periodic Structures
• Realization of an acoustic third-order topological insulator
• Reciprocity in reflection and transmission: what is a "phonon diode"?
• Observation of topologically protected helical edge modes in Kagome elastic plates
• Edge states and topological pumping in elastic lattices with periodically modulated coupling
• Wave propagation in one-dimensional nonlinear acoustic metamaterials
• Edge States and Topological Pumping in Stiffness Modulated Elastic Plates
• Space-time Variant Self-growing Bandgap in Nonlinear Acoustic Metamaterial
• $\mathcal{P}\mathcal{T}$-Symmetric Topological Edge-Gain Effect
• Valley Anisotropy in Elastic Metamaterials
• Asymmetric Nonlinear System is Not sufficient for Non-Reciprocal Quantum Wave Diode