title: Magnetic field distribution of a highly focused radially-polarized light beam: comment.
abstract: This is a comment in response to the claims made in a recent paper by Zhang and Ding [Opt. Express 17, 22235-22239 (2009)]. The authors claimed that an error has been found in a previous paper [Opt. Express 12, 3377-3382 (2004)] and provided a "guess" of how the Poynting vector was calculated. These claims are incorrect and are based on a misconception.
authors.affiliation: Electro-Optics Graduate Program, University of Dayton, Dayton, Ohio 45469-0245, USA. Qiwen.Zhan@notes.udayton.edu
authors.forename: Qiwen
authors.initials: Q
authors.lastname: Zhan
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004574:Electromagnetic Fields; D004867:Equipment Design / Q000379:methods*; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry*; D008027:Light; D008280:Magnetics; D015233:Models, Statistical; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods*; D012542:Scattering, Radiation
chemical_list: D006046:Gold