This Letter introduces and discusses a difference in the behavior of a cylindrical diffractive lens encoded with subwavelength structures illuminated with monochromatic coherent light in the cases of TE and TM polarization. The effective medium theory is used to model with new binary phase function the diffractive lens. A new algorithm combines the finite-difference time domain for the propagation in the near field and the radiation spectrum method for the propagation in the far field. We observe the existence in the TM polarization of a second spot at half the distance of the focal length not predictable by scalar theory.
© 2011 Optical Society of America
Diffraction and Gratings
Original Manuscript: January 12, 2011
Revised Manuscript: February 22, 2011
Manuscript Accepted: February 28, 2011
Published: March 28, 2011
Victorien Raulot, Philippe Gérard, Bruno Serio, Manuel Flury, and Patrick Meyrueis, "Comparison of the behavior of a subwavelength diffractive lens in TE and TM polarization allowing some nonstandard functions," Opt. Lett. 36, 1194-1196 (2011)