Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • Current Optics and Photonics
  • Vol. 2,
  • Issue 2,
  • pp. 147-152
  • (2018)

Numerical Study of a Novel Bi-focal Metallic Fresnel Zone Plate Having Shallow Depth-of-field Characteristics

Open Access Open Access

Abstract

We propose a novel bi-focal metallic Fresnel zone plate (MFZP) with shallow depth-of-field (DOF) characteristics. We design the specific annular slit patterns, exploiting the phase-selection-rule method along with the particle swarm optimization algorithm, which we have recently proposed. We numerically investigate the novel characteristics of the bi-focal MFZP in comparison with those of another bi-focal MFZP having equivalent functionality but designed by the conventional multi-zone method. We verify that whilst both bi-focal MFZPs can produce dual focal spots at 15 μm and 25 μm away from the MFZP plane, the former exhibits characteristics superior to those of the latter from the viewpoint of axial resolution, including the axial side lobe suppression and axial DOF shallowness. We expect the proposed bi-focal MFZP can readily be fabricated with electron-beam evaporation and focused-ion-beam processes and further be exploited for various applications, such as laser micro-machining, optical trapping, biochemical sensing, confocal sensing, etc.

© 2018 Optical Society of Korea

PDF Article
More Like This
Metallic Fresnel zone plate implemented on an optical fiber facet for super-variable focusing of light

Hyuntai Kim, Jinseob Kim, Haechan An, Yohan Lee, Gun-yeal Lee, Jeongkyun Na, Kyoungyoon Park, Seungjong Lee, Seung-Yeol Lee, Byoungho Lee, and Yoonchan Jeong
Opt. Express 25(24) 30290-30303 (2017)

Multifractal zone plates

Fernando Giménez, Walter D. Furlan, Arnau Calatayud, and Juan A. Monsoriu
J. Opt. Soc. Am. A 27(8) 1851-1855 (2010)

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)

Cited By

Optica participates in Crossref's Cited-By Linking service. Citing articles from Optica Publishing Group journals and other participating publishers are listed here.


Select as filters


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