Abstract
Circularly polarized (CP) thermal emission possesses huge application value in the fields of infrared detecting and polarimetric thermal imaging; however, the naturally occurring infrared source is incoherent and unpolarized. In this paper, we designed a broadband CP source adaptive for high temperature in consideration of the collision frequency of the electrons increasing with temperature. Compared with the structure proposed before, “I”-shaped resonators based on refractory plasmonic material generate the linearly polarized (LP) emission and the dielectric quarter-wave plate enhances the degree of emitted CP by suppressing the parasitic radiation. More than 80 % right-handed circularly polarized (RCP) emissivity in wavelengths ranging from 3.28 to 4.81 μm within 706 to 884 K is theoretically achieved.
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This work was supported by the National Natural Science Funds (No. 61575032).
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Song, M., Yu, H., Luo, J. et al. Tailoring Infrared Refractory Plasmonic Material to Broadband Circularly Polarized Thermal Emitter. Plasmonics 12, 649–654 (2017). https://doi.org/10.1007/s11468-016-0310-6
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DOI: https://doi.org/10.1007/s11468-016-0310-6