Sensing at terahertz frequencies

Abstract

In this chapter a review of sensing applications working at terahertz (THz) frequencies is performed. Firstly, an introductory section putting in context the THz regime and highlighting particularities and potential applications at this frequency band is outlined. Then, a comprehensive examination of sensing solutions following different technologies investigated during the last two decades is presented. Special attention is given to the fibre optics solutions and free-space approaches based on metasurfaces. Finally, plasmonic sensing platforms and waveguide solutions are discussed as well.