Terahertz metasurfaces: Fabrication and characterization of flat lenses and antennas

The control of electromagnetic waves at terahertz frequencies is possible with bulky or voluminous structures like planar antennas with Silicon lenses or classical horn antennas. In this work, we present the development of Metasurfaces in order to achieve flat or low profile devices such as flat lenses with V-shape cells and also antennas with corrugations. The lenses, with a single or a multilayer metallization, and antennas with straight and circular corrugations are designed and characterized at terahertz frequencies.