Journal
APPLIED OPTICS
Volume 51, Issue 10, Pages C13-C16Publisher
Optica Publishing Group
DOI: 10.1364/AO.51.000C13
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- Ministry of Science and Education of Ukraine [457/09]
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It is known that the orbital angular momentum of a paraxial light beam is related to the rotational features of the instantaneous optical-frequency oscillation pattern within the beam cross section [J. Opt. A 11, 094004 (2009)]. Now this conclusion is generalized: any identifiable directed motion of the instantaneous two-dimensional pattern of the field oscillations (running behavior of the instant oscillatory pattern) corresponds to the transverse energy flow in the experimentally observable time-averaged field. The transverse orbital flow density can be treated as a natural geometric and kinematic characteristic of this running behavior. (C) 2012 Optical Society of America
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