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Opt Express. 2008 Jun 23;16(13):9411-6.

The Poynting vector and angular momentum of Airy beams.

Author information

  • 1NASA Center for Optical Sensing andImaging, DOD Center of Nanoscale Photonics, Physics Department, The City College and Graduate School of the City University of New York, New York, NewYork 10031, USA. hsztul@gc.cuny.edu

Abstract

We analyze and describe the evolution of the Poynting vector and angular momentum of the Airy beam as it propagates through space. A numerical approach is used to show the Poynting vector follows the tangent line of the direction of propagation. A similar approach is used to show that while the total angular momentum of the Airy beam is zero, the angular momentum of the main intensity peak and the Airy "tail" are non-zero.

PMID:
18575506
[PubMed - indexed for MEDLINE]
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