TITLE

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

AUTHOR(S)
Adam, Ronan; Chusseau, Laurent; Grosjean, Thierry; Penarier, Annick; Guillet, Jean-Paul; Charraut, Daniel
PUB. DATE
October 2009
SOURCE
Journal of Applied Physics;Oct2009, Vol. 106 Issue 7, p073107
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
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.
ACCESSION #
44642402

 

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