A scheme is proposed and demonstrated that realizes the rapid simultaneous measurement of orthogonal terahertz fields. A fibre-coupled multi-pixel THz emitter on InGaAs generated orthogonal polarization states, with a dynamic range and bandwidth comparable to a commercial antenna. We developed a dual-frequency modulation/demodulation scheme that used a conventional photoconductive detector to record the orthogonal polarization states. This work has significant potential to improve the speed of polarization-resolved THz spectroscopy and imaging. We demonstrate its efficiency by characterizing birefringent crystalline materials and anisotropic metamaterial.
Add the full text or supplementary notes for the publication here using Markdown formatting.