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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 8, Iss. 5 — Jun. 6, 2013

Evolutions of speckles on rough glass/silver surfaces with film thickness

Meina Zhang, Zhenhua Li, Xiaoyi Chen, Guotao Liang, Shuyun Wang, Shuyun Teng, and Chuanfu Cheng  »View Author Affiliations

Optics Express, Vol. 21, Issue 7, pp. 8831-8842 (2013)

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This paper reports experimental studies on speckles produced by the rough silver films. The speckles on the rough glass/silver surfaces are measured with a microscopic imaging system. The structures of speckle patterns have the characteristics of fractals and multi-scaled sizes. We find that with the increase of the silver film thickness, the contrast of the speckles increases, and the intensity probability density functions gradually transit to exponential decay. We calculate the global and the local correlation functions of the speckle patterns, and find that both the fractal exponent and correlation length of the small-sized speckles decrease with the thickness of the silver films. We use the mechanisms of rough dielectric interface scattering and random surface plasmon waves to give the preliminary explanations for the evolutions of the speckles.

© 2013 OSA

OCIS Codes
(030.6140) Coherence and statistical optics : Speckle
(240.6680) Optics at surfaces : Surface plasmons
(290.0290) Scattering : Scattering

ToC Category:
Coherence and Statistical Optics

Original Manuscript: February 8, 2013
Revised Manuscript: March 21, 2013
Manuscript Accepted: March 21, 2013
Published: April 3, 2013

Virtual Issues
Vol. 8, Iss. 5 Virtual Journal for Biomedical Optics

Meina Zhang, Zhenhua Li, Xiaoyi Chen, Guotao Liang, Shuyun Wang, Shuyun Teng, and Chuanfu Cheng, "Evolutions of speckles on rough glass/silver surfaces with film thickness," Opt. Express 21, 8831-8842 (2013)

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