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Optics Express

Optics Express

  • Editor: J. H. Eberly
  • Vol. 9, Iss. 12 — Dec. 3, 2001
  • pp: 658–673

Focusing of beams into subwavelength area in an inhomogeneous medium

N.I. Petrov  »View Author Affiliations


Optics Express, Vol. 9, Issue 12, pp. 658-673 (2001)
http://dx.doi.org/10.1364/OE.9.000658


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Abstract

Propagation and focusing of nonparaxial Gaussian beams with spherical wavefront in a graded-index medium are investigated using quantum-theoretical method of coherent states. Explicit expressions for the trajectory and width of a beam taking into account all correction terms to the paraxial approximation have been obtained. Electromagnetic field distributions in longitudinal and lateral directions are simulated. Diffraction of strongly focused high-aperture wave beams is investigated theoretically. The ratio of intensities of evanescent and propagating fields is calculated for different values of focused spot.

© Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(230.7370) Optical devices : Waveguides
(260.2110) Physical optics : Electromagnetic optics
(350.5500) Other areas of optics : Propagation

ToC Category:
Research Papers

History
Original Manuscript: October 18, 2001
Published: December 3, 2001

Citation
Nikolai Petrov, "Focusing of beams into subwavelength area in an inhomogeneous medium," Opt. Express 9, 658-673 (2001)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-9-12-658


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