“…( 1) is usually used for a monochromatic incident field, U 0 ðp 0 ; tÞ ¼ U 0 ðp 0 ; !Þe À j!t , with a single frequency ! and the constant complex amplitude U 0 ðp 0 ; !Þ; however, it is also applicable for a broad-band pulse or a polychromatic field, [1][2][3][4][5][6][7][8][9][10] which can be superposed with monochromatic fields via the Fourier integral. 15) In cylindrical coordinate, the Fourier transform is called Fourier-Hankel transform which is defined as 16) FHðgð 0 ; 0 ÞÞ ¼…”