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Article Dans Une Revue Applied Physics Letters Année : 2010

Experimental verification of negative refraction for a wedge-type negative index metamaterial operating at terahertz

Résumé

We report on angle-resolved time domain spectroscopy (TDS) carried out on a prismlike negative index metamaterial operating around 0.5 THz. The wedge-type devices are constituted of hole arrays etched in gold thin films, which are stacked according to a sequential mask shift. By means of a goniometric TDS setup and subsequent analysis of the temporal waveforms, negative refraction is demonstrated with values close to n=−1 around 0.5 THz. The dispersion of refractive index retrieved from the Snell–Descartes law shows comparable trends in comparison with the dispersion deduced from complex transmission and reflection measurements on slab-type samples.
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Dates et versions

hal-00548626 , version 1 (20-12-2010)

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Shengxiang Wang, Frédéric Garet, Karine Blary, Eric Lheurette, Jean-Louis Coutaz, et al.. Experimental verification of negative refraction for a wedge-type negative index metamaterial operating at terahertz. Applied Physics Letters, 2010, 97, pp.181902-1-3. ⟨10.1063/1.3511540⟩. ⟨hal-00548626⟩
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