Send to

Choose Destination
J Opt Soc Am A Opt Image Sci Vis. 2008 Mar;25(3):643-6.

Angular momentum flux of counterpropagating paraxial beams.

Author information

Taurida National V.I. Vernadsky University, Vernadsky Prospekt, 4, Simferopol, 95007 Crimea, Ukraine.


We study the angular momentum (AM) of the arbitrary superposition of counterpropagating paraxial beams that have the same magnitude of the wavenumber. We derive compact analytical expressions for the total AM in a transverse cross section (linear AM density) and the total AM flux through the cross section. We demonstrate that whereas for the time-averaged linear AM density its separation into the spin and orbital parts is not, generally, observed, the total time-averaged AM flux is separated into well-identifiable spin and orbital constituents. Moreover, we show that such a flux is also naturally separated into the fluxes of forward- and backward-propagating beams.


Supplemental Content

Full text links

Icon for Optical Society of America
Loading ...
Support Center