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Article Dans Une Revue Journal of Applied Physics Année : 2009

Near-field wire-based passive probe antenna for the selective detection of the longitudinal electric field at THz frequencies

Résumé

A passive probe antenna for cw near-field microscopy at millimeter and submillimeter wavelengths is defined. It is based on the coupling between a free-space linearly polarized propagating beam to a wire mode. This is obtained efficiently owing to a discontinuous phase plate. This passive “optical” structure allows either the generation of a subwavelength confinement of the longitudinal electric field (polarized along the wire antenna) or, due to reciprocity, the collection of the longitudinal component of the electric field (along the wire antenna) with subwavelength resolution. The emission and collection properties of the proposed antenna have been demonstrated experimentally using a preliminary realization designed to work at 0.1 THz. Experimental results are well supported by calculations
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hal-00446937 , version 1 (25-03-2021)

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Ronan Adam, Laurent Chusseau, Thierry Grosjean, Annick Pénarier, Jean-Paul Guillet, et al.. Near-field wire-based passive probe antenna for the selective detection of the longitudinal electric field at THz frequencies. Journal of Applied Physics, 2009, 106 (7), pp.073107. ⟨10.1063/1.3236665⟩. ⟨hal-00446937⟩
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