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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 8, Iss. 11 — May. 21, 2001
  • pp: 590–598

Evolution of subcycle pulses in nonparaxial Gaussian beams

Peeter Saari  »View Author Affiliations

Optics Express, Vol. 8, Issue 11, pp. 590-598 (2001)

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A simple but exact treatment of spatiotemporal behavior of ultrawideband pulses under an arbitrarily tight focusing is developed. The model makes use of the oblate spheroidal coordinate system to represent free scalar field as if generated by a point-like source-and-sink pair placed at a complex location. The results, illustrated by animated 3D plots, demonstrate characteristic temporal reshaping of the pulses in the course of propagation through the focus, which is a spectacular manifestation of the Gouy phase shift. It is shown that the salient features of the reshaping, which were recently established for the paraxial limit, remain valid beyond it. The treatment is particularly applicable to an ultrawideband isodiffracting ultrashort terahertz-domain or light pulses in high-aperture resonators, such as microcavities, and it is usable in femto- and attosecond optics in general.

© Optical Society of America

OCIS Codes
(000.3860) General : Mathematical methods in physics
(140.4780) Lasers and laser optics : Optical resonators
(260.2110) Physical optics : Electromagnetic optics
(320.0320) Ultrafast optics : Ultrafast optics
(320.5550) Ultrafast optics : Pulses

ToC Category:
Research Papers

Original Manuscript: April 11, 2001
Published: May 21, 2001

Peeter Saari, "Evolution of subcycle pulses in nonparaxial Gaussian beams," Opt. Express 8, 590-598 (2001)

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