# Experimental Observation of Temporal Pumping in Electromechanical Waveguides.

@article{Xia2021ExperimentalOO, title={Experimental Observation of Temporal Pumping in Electromechanical Waveguides.}, author={Yiwei Xia and Emanuele Riva and Matheus Inguaggiato Nora Rosa and Gabriele Cazzulani and Alper Erturk and Francesco Braghin and Massimo Ruzzene}, journal={Physical review letters}, year={2021}, volume={126 9}, pages={ 095501 } }

We experimentally demonstrate temporal pumping of elastic waves in an electromechanical waveguide. Temporal pumping exploits a virtual dimension mapped to time, enabling the generation and control of edge states, typical of two-dimensional systems, in a one-dimensional waveguide. We show experimentally that the temporal modulation of the stiffness drives the transfer of edge states from one boundary of the waveguide to the other. The considered implementation, that consists of an elastic…

## 29 Citations

Bandgap Engineering in Phononic Crystals and Elastic Metamaterials

- Materials Science
- 2022

In solid state physics, a bandgap (BG) refers to a range of energies where no electronic states can exist. This concept was extended to classical waves, spawning the entire fields of photonic and…

Elastic Temporal Waveguiding

- Physics
- 2022

We provide a theoretical framework to mold time-modulated lattices with frequency conversion and wave-steering capabilities. We initially focus on 1D lattices, whereby a suﬃciently slow…

Multiband Pure Topological States in Elastic Structures

- PhysicsFrontiers in Physics
- 2022

Inspired by notions of topological physics, recent years have witnessed the rapid development of mechanical metamaterials with novel properties of topological states. However, most of the current…

Topological edge states of quasiperiodic elastic metasurfaces

- PhysicsMechanical Systems and Signal Processing
- 2022

Temporal waveguiding in modulated 2D lattices

- PhysicsSmart Structures and Materials + Nondestructive Evaluation and Health Monitoring
- 2022

In this work we investigate the transient dynamics of time modulated 2D spring-mass lattices. We show that a suitable temporal modulation of the stiffness parameters can be employed to functionally…

Tailoring edge-to-edge pumping via adiabatic transformations and non-Hermitian shortcuts

- PhysicsSmart Structures and Materials + Nondestructive Evaluation and Health Monitoring
- 2022

We propose a systematic way to achieve superfast edge-to-edge transformations in modulated mechanical lattices. According to the bulk-edge correspondence principle, the occurrence of localized edge…

A semiclassical treatment of spinor topological effects in driven, inhomogeneous insulators under external electromagnetic fields

- Physics
- 2022

Introducing internal degrees of freedom in the description of topological insulators has led to a myriad of theoretical and experimental advances. Of particular interest are the eﬀects of periodic…

Encircling exceptional points of Bloch waves: mode conversion and anomalous scattering

- PhysicsJournal of Physics D: Applied Physics
- 2022

The normal modes of nonconservative systems coalesce at the so-called exceptional points (EPs) of their spectrum. These degeneracy points are the source of unusual phenomena, some of which are…

Harnessing $\mathcal{PT}$-symmetry in non-Hermitian stiffness-modulated waveguides

- Physics
- 2022

The recent progress in the context of elastic metamaterials and modulated waveguides with digitally controllable properties has opened new pathways to overcome the limitations dictated by Hermitian…

Wave beaming and diffraction in quasicrystalline elastic metamaterial plates

- Physics
- 2022

In this paper, we present numerical and experimental evidence of directional wave behavior, i.e. beaming and diffraction, along high-order rotational symmetries of quasicrystalline elastic…

## References

SHOWING 1-10 OF 81 REFERENCES

Landau-Zener Transition in the Dynamic Transfer of Acoustic Topological States.

- PhysicsPhysical review letters
- 2021

This work demonstrates the transfer of topological boundary states (TBSs) across the bulk to the opposite boundary in an acoustic waveguide system and unveils the quantitative condition for the breakdown of adiabaticity in the system by demonstrating the Landau-Zener transition with both theory and experiments.

Experimental Demonstration of Dynamic Topological Pumping across Incommensurate Bilayered Acoustic Metamaterials.

- PhysicsPhysical review letters
- 2020

The first unassisted dynamic energy transfer across a metamaterial is reported, via pumping of such topological edge modes in a topological aperiodic acoustic crystal, with a phason that can be fast and periodically driven in adiabatic cycles.

Fast, robust, and amplified transfer of topological edge modes on a time-varying mechanical chain

- Physics
- 2020

We show that it is possible to successfully, rapidly and robustly transfer a topological vibrational edge mode across a time-varying mechanical chain. The stiffness values of the springs of the chain…

Landau-Zener Transition in Topological Acoustic Pumping

- Physics
- 2020

Quantized charge pumping is a robust adiabatic phenomenon uniquely existing in topologically nontrivial systems. Such topological pumping not only brings fundamental insights to the evolution of…

Demonstration of Dynamic Topological Pumping Across Incommensurate Acoustic Meta-Crystals

- Physics
- 2020

A Thouless topological pump can be regarded as a dynamical version of the integer quantum Hall effect. In a finite configuration, a topological pump displays edge modes, which emerge dynamically from…

Adiabatic pumping via avoided crossings in stiffness-modulated quasiperiodic beams

- PhysicsPhysical Review B
- 2020

In this paper we report on adiabatic pumping in quasiperiodic stiffness-modulated beams. We show that distinct topological states populating nontrivial gaps can nucleate avoided crossings…

Topological Edge States in Quasiperiodic Locally Resonant Metastructures

- Physics
- 2020

In extending the ideas of topological phases of matter to acoustic and mechanical systems, a quasiperiodic arrangement of resonators introduces frequency band gaps in addition to the locally resonant…

Non-adiabatic time-optimal edge mode transfer on mechanical topological chain

- Physics
- 2019

We show that it is possible to successfully transfer topologically protected edge modes across a mechanical chain, with non-adiabatic optimal control schemes, in a time even shorter than their own…

Edge states and topological pumping in stiffness-modulated elastic plates

- PhysicsPhysical Review B
- 2020

We demonstrate that modulations of the stiffness properties of an elastic plate along a spatial dimension induce edge states spanning non-trivial gaps characterized by integer valued Chern numbers.…

Experimental Observation of Nonreciprocal Band Gaps in a Space-Time-Modulated Beam Using a Shunted Piezoelectric Array

- PhysicsPhysical Review Applied
- 2020

The breaking of reciprocity in elastic wave propagation can be achieved through modulation of stiffness in space and time, which is reflected in asymmetrical Bloch diagrams. Here this principle is…