The Times, Monday, June 17, 2019

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Article "How rise of quake-proofing stopped fall of Roman Empire" by Mark Bridge, THE TIMES, Monday, June 17, 2019

Article paru dans le quotidien Londonien concernant les travaux de Stéphane Brûlé de de la société MENARD en collaboration avec Stefan Enoch et Sébastien Guenneau de l’Institut Fresnel (AMU, CNRS, ECM) et leurs résultats parus dans l’article "Role of nanophotonics in the birth of seismic megastructures".

Reference : "Role of nanophotonics in the birth of seismic megastructures", Stéphane Brûlé, Stefan Enoch et Sébastien Guenneau, Published Online 2019-08-01
DOI : https://doi.org/10.1515/nanoph-2019-0106

Abstract :
The discovery of photonic crystals thirty years ago, in conjunction with research advances in plasmonics and metamaterials, has inspired the concept of decameter scale metasurfaces, coined seismic metamaterials, for an enhanced control of surface (Love and Rayleigh) and bulk (shear and pressure) elastodynamic waves. The powerful mathematical tools of coordinate transforms, effectivemedium and Floquet-Bloch theories, which have revolutionized nanophotonics, can be translated in the language of civil engineering and geophysics. Experiments on seismic metamaterials made of buried elements in the soil demonstrate that the fore mentionedtools make possible a novel description of complex phenomena of soil-structureinteraction during a seismic disturbance.But the concepts are already moving to more futuristic conceptsand the same notions developed for structured soils are now used to examine the effects of buildings viewedas above surface resonators in megastructures such as metacities.But this perspective of the future should not make us forget the heritage of the ancient peoples. Indeed,we finally point out the striking similarity between an invisibility cloak design and the architecture of some ancient megastructures as antique Gallo-Roman theaters and amphitheatres.

- More article : news in Physics World : Did the Romans build seismic invisibility cloaks ?

Contact : Sébastien GUENNEAU