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Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 8 — Apr. 15, 2001
  • pp: 485–487

Physical origin of the Gouy phase shift

Simin Feng and Herbert G. Winful  »View Author Affiliations


Optics Letters, Vol. 26, Issue 8, pp. 485-487 (2001)
http://dx.doi.org/10.1364/OL.26.000485


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Abstract

We show explicitly that the well-known Gouy phase shift of any focused beam originates from transverse spatial confinement, which, through the uncertainty principle, introduces a spread in the transverse momenta and hence a shift in the expectation value of the axial propagation constant. A general expression is given for the Gouy phase shift in terms of expectation values of the squares of the transverse momenta. Our result also explains the phase shift in front of the Kirchhoff diffraction integral.

© 2001 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(050.1960) Diffraction and gratings : Diffraction theory
(050.5080) Diffraction and gratings : Phase shift

Citation
Simin Feng and Herbert G. Winful, "Physical origin of the Gouy phase shift," Opt. Lett. 26, 485-487 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-8-485

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