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Optics Letters

Optics Letters


  • Vol. 28, Iss. 17 — Sep. 1, 2003
  • pp: 1531–1533

Near-field speckles produced by random self-affine surfaces and their contrast transitions

Chuanfu Cheng, Chunxiang Liu, Xiaorong Ren, Man Liu, Shuyun Teng, and Zhizhan Xu  »View Author Affiliations

Optics Letters, Vol. 28, Issue 17, pp. 1531-1533 (2003)

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By use of a numerical calculation based on Green’s integral equation, we study the near-field speckles produced by the random self-affine fractal surfaces of a dielectric medium. The speckle intensities evolve considerably in the near-field region, and the local fluctuations in them disappear before they have traversed the distance of a wavelength. The transition of the speckle contrast either on the surface or in the near field and in the neighborhood non-near-field regions depends on lateral correlation length ξ and roughness exponent α of the random surfaces.

© 2003 Optical Society of America

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(050.1940) Diffraction and gratings : Diffraction
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry
(240.6690) Optics at surfaces : Surface waves

Chuanfu Cheng, Chunxiang Liu, Xiaorong Ren, Man Liu, Shuyun Teng, and Zhizhan Xu, "Near-field speckles produced by random self-affine surfaces and their contrast transitions," Opt. Lett. 28, 1531-1533 (2003)

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