Free-standing terahertz chiral meta-foils exhibiting strong optical activity and negative refractive index

Jianfeng Wu, Binghao Ng, Shuvan P. Turaga, Mark B.H. Breese, Stefan A. Maier, Minghui Hong, Andrew A. Bettiol, Herbert O. Moser

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37 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number141106
Number of pages5
JournalApplied Physics Letters
Volume103
Issue number14
DOIs
Publication statusPublished - 30 Sept 2013
Externally publishedYes

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