Design of cubic-phase optical elements using subwavelength microstructures.
We describe a design methodology for synthesizing cubic-phase optical elements using two-dimensional subwavelength microstructures. We combined a numerical and experimental approach to demonstrate that by spatially varying the geometric properties of binary subwavelength gratings it is possible to produce a diffractive element with a cubic-phase profile. A test element was designed and fabricated for operation in the LWIR, approximately lambda=10.6 microm. Experimental results verify the cubic-phase nature of the element.
Department of Electrical Engineering and Computer Science, The Catholic University of America, Washington, DC 20064, USA.
Mark S
MS
Mirotznik
Joseph
J
van der Gracht
David
D
Pustai
Scott
S
Mathews
D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008872:Microwaves; D008904:Miniaturization; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*