Microwave seminar | 17 January 2022

Dr. Alex Powell
University of Exeter
3D microwave metamaterials via advanced manufacturing approaches

Metamaterials research has come on in leaps and bounds in the last two decades, but most experimental demonstrations have been limited to planar surfaces or extruded 2D shapes (e.g. a cylinder), and these geometrical constraints have meant that the physics inherent in truly 3D structures have been beyond the reach of experimental science. However, with the maturing of 3D printing and other advanced manufacturing technologies, this is rapidly changing. In this talk I will discuss the potential for some of these new fabrication routes and present several examples of 3D metamaterials: Firstly, I will discuss structures made from interlaced 3D meshes, which possess an extremely broadband longitudinal mode that could be a path to overcome the bandwidth limitations of typical metamaterials. Secondly I will look at meta-particles that produce spoof-plasmonic behaviour analogous to that found in plasmonic nanoparticles in a fully 3D shape for the first time. Finally I will discuss some more exotic geometries and novel fabrication routes to create structures that could previously only exist in simulations.