Electromagnetic analysis of axially symmetric diffractive optical elements illuminated by oblique incident plane waves.
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.
Shi
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Department of Electrical and Computer Engineering, University of Delaware, Newark 19716, USA.
Prather
D W
DW