期刊
APPLIED PHYSICS LETTERS
卷 103, 期 14, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4823594
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资金
- NUS Core Support [C-380-003-003-001]
- EPSRC
- Leverhulme Trust
- Engineering and Physical Sciences Research Council [EP/H000917/2, EP/D063329/1] Funding Source: researchfish
- EPSRC [EP/H000917/2, EP/D063329/1] Funding Source: UKRI
A chiral meta-foil consisting of a self-supported square array of interconnected conjugated rosettes is demonstrated at terahertz frequencies. It exhibits strong optical activity and circular dichroism. Negative refractive index with a figure-of-merit as high as 4.2 is achieved, attributed to its free-standing nature. Experimental results are in good agreement with numerical simulation. Free-standing chiral meta-foils provide a unique approach to create a completely all-metal chiral metamaterial, which can be flexibly integrated into optical setups while eliminating dielectric insertion losses. (C) 2013 AIP Publishing LLC.
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