We present an analysis of axially symmetric diffractive optical elements illuminated by off-axis or oblique incident plane waves. The analysis is performed with a finite-difference time-domain method that has been formulated to exploit axial symmetry yet accommodate off-axis illumination. This approach is compared with a full three-dimensional formulation and is found to be more efficient in both memory requirements and computational time. Validation and applications of this method are presented.
© 2001 Optical Society of America
Shouyuan Shi and Dennis W. Prather, "Electromagnetic analysis of axially symmetric diffractive optical elements illuminated by oblique incident plane waves," J. Opt. Soc. Am. A 18, 2901-2907 (2001)