Tailoring near-field patterns with concentrically corrugated plates

Mohammadreza F. Imani; Anthony Grbic

doi:10.1063/1.3224882

Tailoring near-field patterns with concentrically corrugated plates

Mohammadreza F. Imani, Anthony Grbic

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

We present a device that can form a two-dimensional subwavelength focus along a specified near-field focal plane. The device, referred to as a corrugated near-field plate, consists of a coaxially fed aperture in a concentrically corrugated metallic surface. A procedure for designing such devices is outlined. In addition, simulation results are reported for a design that operates at around 1 GHz and forms a focus with a null-to-null beamwidth of λ/20 at a focal plane λ/15 from its surface. The effect of losses is also studied. Such devices will find use in near-field microscopy and probing systems.

Original language	English (US)
Article number	111107
Journal	Applied Physics Letters
Volume	95
Issue number	11
DOIs	https://doi.org/10.1063/1.3224882
State	Published - 2009
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3224882

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title = "Tailoring near-field patterns with concentrically corrugated plates",

abstract = "We present a device that can form a two-dimensional subwavelength focus along a specified near-field focal plane. The device, referred to as a corrugated near-field plate, consists of a coaxially fed aperture in a concentrically corrugated metallic surface. A procedure for designing such devices is outlined. In addition, simulation results are reported for a design that operates at around 1 GHz and forms a focus with a null-to-null beamwidth of λ/20 at a focal plane λ/15 from its surface. The effect of losses is also studied. Such devices will find use in near-field microscopy and probing systems.",

author = "Imani, {Mohammadreza F.} and Anthony Grbic",

note = "Funding Information: This work was supported by an Air Force Office of Scientific Research (AFOSR) Young Investigator Research Program Award (Grant No. FA9550-08-1-0067), a NSF Faculty Early Career Development Award (Grant No. ECCS-0747623) and through the Multidisciplinary University Research Initiative Program (Grant No. FA9550-06-01-0279). ",

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AU - Imani, Mohammadreza F.

AU - Grbic, Anthony

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PY - 2009

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N2 - We present a device that can form a two-dimensional subwavelength focus along a specified near-field focal plane. The device, referred to as a corrugated near-field plate, consists of a coaxially fed aperture in a concentrically corrugated metallic surface. A procedure for designing such devices is outlined. In addition, simulation results are reported for a design that operates at around 1 GHz and forms a focus with a null-to-null beamwidth of λ/20 at a focal plane λ/15 from its surface. The effect of losses is also studied. Such devices will find use in near-field microscopy and probing systems.

AB - We present a device that can form a two-dimensional subwavelength focus along a specified near-field focal plane. The device, referred to as a corrugated near-field plate, consists of a coaxially fed aperture in a concentrically corrugated metallic surface. A procedure for designing such devices is outlined. In addition, simulation results are reported for a design that operates at around 1 GHz and forms a focus with a null-to-null beamwidth of λ/20 at a focal plane λ/15 from its surface. The effect of losses is also studied. Such devices will find use in near-field microscopy and probing systems.

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Tailoring near-field patterns with concentrically corrugated plates

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