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Observation of the longitudinal field of a focused laser beam by second-harmonic generation

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Abstract

We demonstrate second-harmonic generation from a (110)ZnSe crystal for focused, axially symmetric polarized beams. Distinctive distributions in polarization and intensity accompanying transverse mode conversion to higher-order Hermite–Gaussian or Laguerre–Gaussian modes are observed. A longitudinal electric field generated by a radially polarized beam is verified by the variation in the intensity distribution.

© 2008 Optical Society of America

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