Discontinuities in the electromagnetic fields of vortex beams in the complex source-sink model

Authors

Andrew Vikartofsky, University of Nebraska - LincolnFollow
Liang-Wen Pi, University of Nebraska-LincolnFollow
Anthony F. Starace, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

5-9-2017

Citation

PHYSICAL REVIEW A 95, 053826 (2017)

DOI: 10.1103/PhysRevA.95.053826

Comments

Copyright © 2017 American Physical Society. Used by permission.

Abstract

An analytical discontinuity is reported in what was thought to be the discontinuity-free exact nonparaxial vortex beam phasor obtained within the complex source-sink model. This discontinuity appears for all odd values of the orbital angular momentum mode. Such discontinuities in the phasor lead to nonphysical discontinuities in the real electromagnetic field components. We identify the source of the discontinuities, and provide graphical evidence of the discontinuous real electric fields for the first and third orbital angular momentum modes. A simple means of avoiding these discontinuities is presented.