Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 29,
  • Issue 17,
  • pp. 2585-2591
  • (2011)

Near-Field Electromagnetic Analysis of Perfect Black Fresnel Zone Plates Using Radial Polarization

Not Accessible

Your library or personal account may give you access

Abstract

We analyze the near-field focalization properties of perfect black Fresnel Zone Plates (FZPs) through the exact solutions of Maxwell equations for radially polarized fields obtained by means of Luneburg vector diffraction theory. The electromagnetic fields are computed assuming Hermite-Gauss and Bessel-Gauss beams as boundary conditions at the FZP plane <i>z</i>=0, which allows us to demonstrate that the total intensity is necessarily focused at <i>z</i>=0 and thus there is not much improvement of the intensity resolution at the focal plane. On the other hand, the Poynting vector exhibits multiple vortices and saddle points in the near-field region while its <i>z</i> component vanishes at the FZP axis and has a large focal depth as well as several residual contributions outside the focal region. These facts suggest that perfect black FZPs do not focus radially polarized fields at the designed focal length when such length is comparable to the wavelength (or smaller). Our results are very similar to the ones obtained for phase FZPs and they are in good agreement with FDTD simulations.

© 2011 IEEE

PDF Article
More Like This
Computational study of diffraction patterns for near-field Fresnel and Gabor zone plates

T. D. Beynon and R. M. R. Strange
J. Opt. Soc. Am. A 17(1) 101-106 (2000)

Electromagnetic theory of Bragg–Fresnel linear zone plates

F. Montiel and M. Nevière
J. Opt. Soc. Am. A 12(12) 2672-2678 (1995)

Diffraction in a stratified region of a high numerical aperture Fresnel zone plate: a simple and rigorous integral representation

Yaoju Zhang, Xiangjun Huang, Dong Zhang, Hongchang An, and Yuxing Dai
Opt. Express 23(6) 8051-8060 (2015)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved