THz Microscopy of Additive Manufactured Metamaterials at 24 GHz with Josephson Cantilevers

Abstract

Metamaterials are subwavelength structures that can be employed to modify properties of electromagnetic radiation. Their possible fields of application are very diverse and range from antennas to optical filter structures [1]. In this work, a THz microscope setup is employed to characterize additive manufactured metamaterial structures. These structures are optimized for a frequency of f = 24.05 GHz and are additive manufactured by the stereolithographic 3D printer Formlabs Form 2. A low-cost radar chip is used as a source of radiation with a frequency of f= 24.05 GHz and a power of up to 20 dBm. The manufactured structures are positioned between the source and the Josephson cantilever. Measurement results are presented for different metamaterial structures and are visualized in three dimensions. The presented method can be employed for rapid prototyping of metamaterial structures for microwave and terahertz radiation, which are subsequently characterized by THz microscopy.