PROJECT TITLE :
Far-Infrared Circular Polarization and Polarization Filtering Based on Fermat's Spiral Chiral Metamaterial
A bilayered-twisted Fermat's spiral chiral metamaterial (FSCMM) is proposed for the belief of circular polarization of so much-infrared waves and polarization filters. It is demonstrated through full-wave simulations that the proposed FSCMM can convert waves from linear to circular polarization (CP) around 2.five THz. The reported FSCMM is sensitive to the handedness of circularly polarized light, where it will filter out either right-handed or left-handed CP light-weight with an optical isolation of thirty five dB around a pair of.five THz. The proposed FSCMM is compact with a dimension of at the so much-infrared operating waveband. The CP conversion and filtering functionalities of the proposed FSCMM are ensured for oblique incidences up to twenty with an optical isolation of more than 25 dB for both - and -oriented linear polarized excitations. The operation bandwidth of the proposed system is enhanced in the level of 0.058 THz to zero.11 THz for two- and three-unit-cell composite systems, respectively. Thanks to the robust circular dichroism, compactness, wide-angle functionalities, and appreciable bandwidth, the proposed FSCMM is helpful for the development of integrated way-infrared spectroscopic and imaging devices.
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