{'fraction_non_alphanumeric': 0.027613412228796843, 'fraction_numerical': 0.01282051282051282, 'mean_word_length': 5.677631578947368, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
A terahertz-wave subwavelength polarization rotator based on metamaterials

We experimentally demonstrate an ultrathin polarization rotator (PR) capable of rotating linearly polarized radiation 90 degrees in the terahertz-gap region by integrating the polarization conversion property from asymmetric split-ring resonators (ASRRs) and the polarization selectivity from S-shape resonators (SRs). This ultrathin-PR possesses a nearly complete polarization conversion up to 97.7% at 1.04 THz and a high conversion transmission coefficient of 0.48, enhanced by a constructive Febry-Perot interference between the ASRRs and the SRs. Furthermore, the overall thickness of the ultrathin PR is about 50 μm, only one-sixth of the incident wavelength, so that the associated optical devices can be miniaturized. The simple metal-dielectric-metal trilayered structure of the ultrathin-PR allows the tolerance of translational misalignment between the ASRRs and SRs and hence significantly facilitates the fabrication process.