Journal
APPLIED PHYSICS LETTERS
Volume 96, Issue 24, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3453446
Keywords
dielectric materials; dispersion relations; metamaterials; numerical analysis; optical constants; slabs
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Funding
- NSFC [60531020]
- 863 Project [2009AA01Z227]
- Program for New Century Excellent Talents [NCET-07-0750]
- National Key Laboratory Foundation [9140C5304020901, 9140C5304020704]
- Danish HTF [004-2007-1]
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We show that anisotropic negative effective dispersion relation can be achieved in pure dielectric rod-type metamaterials by turning from the symmetry of a square lattice to that of a rectangular one. Theoretical predictions and conclusions are verified by both numerical calculations and computer based simulations. The proposed anisotropic metamaterial, is used to construct a refocusing slab lens and a subdiffraction hyperlens. The all-dielectric origin makes it more straightforward to address loss and scaling, thus facilitating future applications in both the terahertz and optical range. (C) 2010 American Institute of Physics. [doi:10.1063/1.3453446]
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