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It is found that the rotation of the Poynting vector of a Laguerre-Gaussian laser mode is proportional to the Gouy phase and for most cases of interest, rotates through less than one revolution in reaching the far field. For a p=0 mode, we show the expression for the rotation is particularly simple and independent of l. At the radius corresponding to maximum intensity, it yields a rotation of only +/- pi/2 as z--> +/- (infinity).
|Glasgow Author(s) Enlighten ID:||Padgett, Prof Miles|
|Authors:||Padgett, M., and Allen, L.|
|College/School:||College of Science and Engineering > School of Physics and Astronomy|
|Journal Name:||Optics Communications|
|Journal Abbr.:||Opt. Commun.|