Geometric Photodetectors for Mid-Infrared Light

We will report zero-bias, uncooled, filterless photodetectors in mid-infrared exhibiting colossal discrimination ratio, close-to-perfect CPL-specific response, a zero-bias responsivity of 392 V/W, and a detectivity of ellipticity down to 0.03-degree Hz-1/2. Our approach employs plasmonic nanostructures array with judiciously designed symmetry, assisted by graphene ribbons to electrically read their near-field optical information. It highlights the potential of hybridizing metasurface and semimetals for miniaturized polarimetry.