Colloquium: Axial fields in phonic crystals

Datum

20.05.2019

Zeit

16:30 - 17:30

Sprecher

Prof. Dr. Sebastian Huber

Zugehörigkeit

ETH Zürich, Dept. Theoretische Physik, Schweiz

Serie

MPI-PKS Kolloquium

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Beschreibung

The elastic properties of materials are determined by a few material constants such as the Young’s modulus. Using super-structures one can effectively change these “constants”. In this way we obtain functionalities such as wave-guiding, acoustic lensing or programmable failure. I will show how topological band theory, known from the description of electrons in solids, provides us with a powerful design-principle for such mechanical metamaterials. Moreover, mechanical metamaterials offer a powerful platform for the study of fundamentally new phenomena that are hard to observe in other arenas. Here, I will highlight the first measurement of a quadrupole topological insulator in a silicon based metamaterial and the implementation of an axial gauge field in an acoustic Weyl system.

Letztmalig verändert: 24.06.2019, 15:14:05