We show that transformation optics can be applied to extend the functionalities of conventional optical devices. In particular, geometrically compressing the input facet of any conventional optical elements can extend the input spatial frequency bandwidth. As an example, we design a Fourier lens that can transform the image to its reciprocal space and operate for incident light of subwavelength profile. An explicit design employing metal–dielectric layers is given for realization.
© 2009 Optical Society of America
Original Manuscript: May 18, 2009
Revised Manuscript: August 19, 2009
Manuscript Accepted: September 9, 2009
Published: October 7, 2009
Jensen Li, Seunghoon Han, Shuang Zhang, Guy Bartal, and Xiang Zhang, "Designing the Fourier space with transformation optics," Opt. Lett. 34, 3128-3130 (2009)