Journal
OPTICS LETTERS
Volume 35, Issue 15, Pages 2588-2590Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.002588
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Funding
- National Natural Science Foundation of China (NSFC) [10874024, 50735007]
- Ministry of Education of China [200804871147]
- Natural Science Foundation of Hubei Province of China [2008CDB004]
- China National Funds for Distinguished Young Scientists [66945021]
- 973 program of China [2010CB923203]
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Recently, it was demonstrated by Gansel et al. [Science 325, 1513 (2009)] that 3D single-helical metamaterials can serve as broadband circular polarizers in the IR range. In this study, we propose a structured metamaterial with double-helical nanowires to construct circular polarizers with boarder wavelength bands in the visible-light and near-IR regions. Using the finite-difference time-domain method, we confirmed that the circular polarizers with the double-helical structures have operation bands more than 50% broader than those of the single-helical structures. (C) 2010 Optical Society of America
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