We demonstrate a metamaterials-based THz broadband polarization rotator which is able to rotate linearly polarized THz wave by 90 degree within a wide frequency range (0.44 to 0.76 THz). The device is characterized both theoretically and experimentally. Analyses show that the multiple-plasmon-resonance is the key for the broadband feature and the phase-shift difference of the two reflection components is critical for the polarization conversion. The approach demonstrated in the work can be useful for constructing building blocks for THz polarimetry.
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| http://dx.doi.org/10.1364/OE.22.028292 | DOI Listing |
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