Near-Field Plates: Metamaterial Surfaces/Arrays for Subwavelength Focusing and Probing

In this paper, we present a brief overview of near-field plates, which are nonperiodic grating-like surfaces/arrays that can focus electromagnetic field to subwavelength resolutions. The general properties of near-field plates are described, and the procedure used to design these devices is outlined...

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Bibliographic Details
Published inProceedings of the IEEE Vol. 99; no. 10; pp. 1806 - 1815
Main Authors Grbic, Anthony, Merlin, Roberto, Thomas, Erin M., Imani, Mohammadreza F.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2011
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna arrays
Apertures
Arrays
Current density
Devices
Diffraction
Diffraction limit
Electromagnetic fields
evanescent wave
Focusing
Metamaterials
near field
Near-field radiation pattern
Plates
Surface impedance
Surface waves
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Summary:In this paper, we present a brief overview of near-field plates, which are nonperiodic grating-like surfaces/arrays that can focus electromagnetic field to subwavelength resolutions. The general properties of near-field plates are described, and the procedure used to design these devices is outlined. The design of two separate near-field plates is discussed in detail. One of the near-field plates produces a subwavelength line (1-D) focus while the other a spot (2-D) focus. Potential applications of near-field plates are also reviewed.
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ISSN:0018-9219
1558-2256
DOI:10.1109/JPROC.2011.2106191