We present a fast Hankel transform (FHTn) method for direct numerical evaluation
of electromagnetic (EM) field propagation through an axially symmetric system.
Comparing with the vector-based plane-wave spectrum (VPWS) method, we present an
alternative approach to implement the fast Hankel transform which does not
require an additional coordinate transformation for Fourier transform. The
proposed FHTn method is an efficient approach for numerical evaluation of an
arbitrary integer order of the Hankel transform (HT). As an example to
demonstrate the effectiveness of the proposed method, we apply the FHTn
technique to the analysis of cylindrical EM field propagation through a
©2002 Optical Society of America
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