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Communication Dans Un Congrès Année : 2010

Negative index subwavelength arrays operating at 0.5 THz

Résumé

We report on a double negative metamaterial operating at 0.5 THz. The structure is based on a stack of several metallic arrays patterned with subwavelength apertures. Following the characterisation via TeraHertz Time Domain Spectroscopy, (THz-TDS), dispersion parameters are retrieved using a Fresnel inversion technique. A left handed-band is evidenced around 0.48 THz corresponding to a -3dB level of transmission. This high value is explained by impedance matching condition, as a consequence of the holes shape optimization. The left-handed propagation is explained by means of a lumped element circuit, used to model multi-mode propagation. Finally, we give some simulation results of the negative refraction trough a prism-like structure while the experimental verification is under progress. This work paves new ways in the domains of beam conforming and far field imaging at submillimeter and far infrared wavelengths.
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Dates et versions

hal-00568589 , version 1 (23-02-2011)

Identifiants

  • HAL Id : hal-00568589 , version 1

Citer

Eric Lheurette, Frédéric Garet, Jorge Carbonell, Jean-Louis Coutaz, Didier Lippens. Negative index subwavelength arrays operating at 0.5 THz. 4th European Conference on Antennas and Propagation, EuCAP 2010, Apr 2010, Barcelona, Spain. pp.1-4. ⟨hal-00568589⟩
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