Miniaturized metamaterial terahertz polarization detector

We propose a metamaterial strategy for achieving compact, fast terahertz linear polarization and intensity detection. The device consists of three metamaterial elements arranged in a triple rotational symmetry, with an overall size on the same order of magnitude as the operating wavelength. With terahertz excitation, the local dynamic fields generated by the metamaterial elements couple and produce a Lorentz force, which drives the unidirectional motion of carriers for photoelectric detection of intensity. Meanwhile, the polarization detection can be achieved based on the rotational arrangement of three identical metamaterial elements with their polarization-dependent voltage output. This method can be easily extended across multiple frequency bands, offering a new mechanism for developing miniaturized polarization imaging and on-chip photonic devices.