It is shown that the conventional Hermite-Gaussian wave functions can be generated by assigning complex-source coordinates to multipole field expressions.
© 1985 Optical Society of America
Kwai-Man Luk and Ping-Kong Yu, "Generation of Hermite-Gaussian beam modes by multipoles with complex source points," J. Opt. Soc. Am. A 2, 1818-1820 (1985)