Breaking Temporal Symmetries in Acoustic Metamaterials

2015
Poster talk

Abstract

We discuss our recent investigations on breaking time-reversal and spatio-temporal symmetries to provide novel functionalities in the field of metamaterials, with special emphasis on the field of acoustics and sound manipulation.

Official source

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2015
Poster talk

Abstract

Official source

About this result

Ontological neighbourhood

Chemical engineering

Materials science: Metamaterials

Related concepts (23)

A metamaterial (from the Greek word μετά meta, meaning "beyond" or "after", and the Latin word materia, meaning "matter" or "material") is any material engineered to have a property that is rarely observed in naturally occurring materials. They are made from assemblies of multiple elements fashioned from composite materials such as metals and plastics. These materials are usually arranged in repeating patterns, at scales that are smaller than the wavelengths of the phenomena they influence.

Metamaterial cloaking is the usage of metamaterials in an invisibility cloak. This is accomplished by manipulating the paths traversed by light through a novel optical material. Metamaterials direct and control the propagation and transmission of specified parts of the light spectrum and demonstrate the potential to render an object seemingly invisible. Metamaterial cloaking, based on transformation optics, describes the process of shielding something from view by controlling electromagnetic radiation.

A seismic metamaterial, is a metamaterial that is designed to counteract the adverse effects of seismic waves on artificial structures, which exist on or near the surface of the earth. Current designs of seismic metamaterials utilize configurations of boreholes, trees or proposed underground resonators to act as a large scale material. Experiments have observed both reflections and bandgap attenuation from artificially induced seismic waves.

Related publications (51)

Breaking Temporal Symmetries in Acoustic Metamaterials

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In-Sensor Passive Speech Classification with Phononic Metamaterials

Computational Design of Flexible Planar Microstructures

Ultrabroadband sound control with deep-subwavelength plasmacoustic metalayers