Journal
JOURNAL OF OPTICS
Volume 13, Issue 5, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2040-8978/13/5/055104
Keywords
terahertz region; polarization; metamaterials; circular polarizer
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Funding
- Natural Science Foundation of China (NSFC) [10874024, 61007019, 50735007]
- Ministry of Education of China [200804871147]
- Natural Science Foundation of Hubei Province of China [2008CDB004]
- Central Colleges Basic Scientific Research Operating Expenses [2010MS063]
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We propose a broadband circular polarizer in the terahertz region using helical metamaterials. The finite difference time domain method was used to design the structure and perform the simulation. By properly selecting the parameters of helical metamaterials, including the radius of wires, number of helix-periods, spacing of grids, length of helix-period, and radius of helix, we obtained a broadband helical circular polarizer in the terahertz region that can achieve an extinction ratio above 20:1 in the wavelength range from 66 to 105 mu m.
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