Author: Prof. Dr. Johan Christensen - IMDEA Materials Institute
When: January, 9 - 12PM
Where: Sala de Seminarios
Abstract: Light and sound are the most ubiquitous forms of waves, associated with a variety of phenomena and physical effects such as rainbows and echoes. Light and sound, both categorized as classical waves, have lately been brought into unexpected connections with exotic topological phases of matter. Surprisingly, topological metamaterials became a frontier topic in wave physics. What began as a curiosity driven undertaking in condensed matter physics, evolved into serious possibilities to enable topologically resilient guiding of light, sound and vibrations. The most striking motivation is to ascribe topological robustness to these waves, enabling a seemingly defect-resistance path ahead. In this talk I wish to focus on the basics and some advances coming from my group and experimental collaborators. I will talk about, in the context of phononic metamaterials comprising both sound and vibrations: valley-topology, higher-order topology and corner states, topological defect concerning Majorana-like states, fullerene analogies: carbon nanotubes and Buckyballs, and topological deformations.
