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Propagation of vectorial off-axis Gaussian beams beyond the paraxial approximation

Lü Bai-Da Gao Zeng-Hui

Propagation of vectorial off-axis Gaussian beams beyond the paraxial approximation

Lü Bai-Da, Gao Zeng-Hui
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  • Abstract views:  2991
  • PDF Downloads:  919
  • Cited By: 0
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  • Received Date:  15 March 2005
  • Accepted Date:  29 April 2005
  • Published Online:  20 November 2005

Propagation of vectorial off-axis Gaussian beams beyond the paraxial approximation

  • 1. (1)四川大学激光物理与化学研究所,成都 610064; (2)四川大学激光物理与化学研究所,成都 610064;宜宾学院光电信息研究所,宜宾 644007

Abstract: Based on the vectorial Rayleigh-Sommerfeld diffraction formulation, a solution of the electric-magnetic wave equation is found, which represents vectorial nonparaxial off-axis Gaussian-beams whose propagation equation in free space is expressed in a closed form. The on-axis and far-field expressions of vectorial nonparaxial off-axis Gaussian beams, the propagation equation of vectorial nonparaxial Gaussian beams and the paraxial results are treated as special cases of our general expression. It is shown that the f parameter plays an impotant role in determining the beam nonparaxiality, whereas the off-axis parameters additionally affect the nonparaxial behavior of vectorial nonparaxial off-axis Gaussian beams. Moreover, unlike the on-axis case, there exists the longitudinal component of the field in the y direction for the off-axis case.

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