Thursday, May 29, 2008

Detecting orbital angular momentum in radio signals

A good overview of some of the technical challenges of detecting RD signals with OAM

http://www.slac.stanford.edu/spires/find/hep/www?irn=7762801

Electromagnetic waves with an azimuthal phase shift are known to have a well defined orbital angular momentum. Different methods that allow for the detection of the angular momentum are proposed. For some, we discuss the required experimental setup and explore the range of applicability.

1 comment:

Zen said...

Fascinating topic for a blog. I think OAM is vastly underappreciated. Essentially, light has a 2-D spectrum, and we only think about one aspect of it.

And just as long as we are contemplating the bizarreness of light, consider knotted light, light with closed fieldlines.
http://www.sciencenews.org/view/generic/id/36400/title/A_knot_of_light