Generating evanescent Bessel beams using near-field plates

Mohammadreza F. Imani, Anthony Grbic

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

We present a near-field plate that can generate an evanescent Bessel beam. The metallic plate consists of nonperiodic concentric corrugations that surround a coaxially fed aperture. The design procedure for such a device is outlined. The designed plate is simulated using a full-wave electromagnetic solver and is shown to produce an evanescent Bessel beam, thereby verifying its design and operation. The performance of the near-field plate is contrasted against a coaxial probe and a near-field plate designed to produce an Airy focal pattern with the same beamwidth. Such a device, capable of producing evanescent Bessel beams, will find applications in near-field probing/imaging systems, data storage, and biomedical devices.

Original languageEnglish (US)
Article number6193139
Pages (from-to)3155-3164
Number of pages10
JournalIEEE Transactions on Antennas and Propagation
Volume60
Issue number7
DOIs
StatePublished - 2012
Externally publishedYes

Keywords

  • Bessel beams
  • evanescent waves
  • metamaterials
  • surface impedance
  • surface waves

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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