Document Type
Article
Publication Date
10-2015
Publication Source
Scientific Reports
Abstract
We present a scheme for the construction of coaxially equidistant multiple focal spots with identical intensity profiles for each individual focus and a predetermined number and spacing. To achieve this, the radiation field from an antenna is reversed and then gathered by high numerical aperture objective lenses. Radiation patterns from three types of line sources, i.e., the electric current, magnetic current and electromagnetic current distributions, with cosine-squared taper are respectively employed to generate predominately longitudinally polarized bright spots, azimuthally polarized doughnuts, and focal spots with a perfect spherically symmetric intensity distribution. The required illuminations at the pupil plane of a 4Pi focusing configuration for the creation of these identical multiple focal spots can be easily derived by solving the inverse problem of the antenna radiation field. These unique focal field distributions may find potential applications in laser direct writing and optical microscopy, as well as multiple-particle trapping, alignment, and acceleration along the optical axis.
Inclusive pages
1-8
ISBN/ISSN
2045-2322
Document Version
Published Version
Copyright
This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Publisher
Macmillan Publishers
Volume
5
Peer Reviewed
yes
eCommons Citation
Yu, Yanzhong and Zhan, Qiwen, "Creation of Identical Multiple Focal Spots with Prescribed Axial Distribution" (2015). Electro-Optics and Photonics Faculty Publications. 50.
https://ecommons.udayton.edu/eop_fac_pub/50
Comments
This open-access document is provided for download in compliance with the publisher's policy on self-archiving. Permission documentation is on file.
DOI: http://dx.doi.org/10.1038/srep14673