Terahertz Pulses Emitters with Full Electrical Control on Polarization for THz-TDS

Photoconductive switches are widely used for emission and/or detection of terahertz pulses. The emitted polarization is fixed by the design of the electrodes. In this work, innovative designs of photoconductive switches are proposed providing full electrical control on the direction of polarization of the emitted field. These designs are based on a monolithic on-chip solution with an interdigitated scalable geometry, and might be used either for emission or detection. Without the need of external mechanical components, it allows fast polarization modulation and polarimetry measurements with a large area receiver. It opens the field of precision terahertz polarimetry.