The number of applications employing terahertz (THz) radiation has been growing over the past decades. Most existing applications still rely on either transmission or reflection spectroscopy or imaging, where the amplitude or phase of the THz waves are used for material analysis. Polarization provides additional interesting insights into chirality and anisotropy of many materials and extend conventional THz spectroscopy to THz time-domain polarimetry. Despite its potential, the implementation of highly accurate THz polarimetry remains challenging due to the lack of highly efficient and broadband polarization elements.

In this seminar, I will present intermediate results from my PhD research. The work focuses on the development of various broadband THz polarization elements, including polarizers, waveplates, and vortex generators based on metamaterials. A brief review of each approach and the challenges encountered during the development of these elements will be presented. Perspectives and future directions of the research will also be discussed.