Subwavelength focusing behavior of high numerical-aperture phase Fresnel zone plates under various polarization states

Rakesh G. Mote; Siu Fung Yu; W. Zhou; X. F. Li

doi:10.1063/1.3263728

Subwavelength focusing behavior of high numerical-aperture phase Fresnel zone plates under various polarization states

Rakesh G. Mote, Siu Fung Yu, W. Zhou, X. F. Li

Research output: Journal article publication › Journal article › Academic research › peer-review

42 Citations (Scopus)

Abstract

An analytical model is developed to study the subwavelength focusing characteristics of a binary phase Fresnel zone plate (FZP). The model shows that high numerical-aperture phase FZP under the illumination of linear polarized light produces rotationally asymmetric focal spot with beamwidth varying from 0.36λ to 0.79λ, where λ is the wavelength. On the other hand, rotationally symmetric focal spot with minimum beamwidth of 0.39λ can be obtained from the illumination of radial polarized light.

Original language	English
Article number	191113
Journal	Applied Physics Letters
Volume	95
Issue number	19
DOIs	https://doi.org/10.1063/1.3263728
Publication status	Published - 24 Nov 2009
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3263728

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title = "Subwavelength focusing behavior of high numerical-aperture phase Fresnel zone plates under various polarization states",

abstract = "An analytical model is developed to study the subwavelength focusing characteristics of a binary phase Fresnel zone plate (FZP). The model shows that high numerical-aperture phase FZP under the illumination of linear polarized light produces rotationally asymmetric focal spot with beamwidth varying from 0.36λ to 0.79λ, where λ is the wavelength. On the other hand, rotationally symmetric focal spot with minimum beamwidth of 0.39λ can be obtained from the illumination of radial polarized light.",

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AU - Mote, Rakesh G.

AU - Yu, Siu Fung

AU - Zhou, W.

AU - Li, X. F.

PY - 2009/11/24

Y1 - 2009/11/24

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AB - An analytical model is developed to study the subwavelength focusing characteristics of a binary phase Fresnel zone plate (FZP). The model shows that high numerical-aperture phase FZP under the illumination of linear polarized light produces rotationally asymmetric focal spot with beamwidth varying from 0.36λ to 0.79λ, where λ is the wavelength. On the other hand, rotationally symmetric focal spot with minimum beamwidth of 0.39λ can be obtained from the illumination of radial polarized light.

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JO - Applied Physics Letters

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Subwavelength focusing behavior of high numerical-aperture phase Fresnel zone plates under various polarization states

Abstract

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