We describe the use of stress birefringence in the creation of vortex illumination. A trifold symmetric stress pattern will provide an annular region that exhibits polarization vortices when illuminated with linearly polarized light and scalar vortices when illuminated with circularly polarized light. A finite element plane-stress model is used to analyze the space-variant anisotropy.
© 2007 Optical Society of America
Original Manuscript: June 29, 2006
Revised Manuscript: September 7, 2006
Manuscript Accepted: September 8, 2006
Alexis K. Spilman and Thomas G. Brown, "Stress birefringent, space-variant wave plates for vortex illumination," Appl. Opt. 46, 61-66 (2007)