FLAKE STRUCTURE IN THE SPECKLE FIELD PRODUCED BY A FEW SCATTERERS |
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| Authors: | Liu De-li Qi Dong-ping Teng Shu-yun and Cheng Chuan-fu |
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| Affiliation: | Department of Physics, Shandong Normal University, Jinan 250014, China; Department of Mathematics and Physics, Shandong University of Technology, Jinan 250061, China |
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| Abstract: | This paper reports a new phenomenon, namely, flake structure in the speckle field produced by a few scatterers. This structure appears in the off-axis region and its size is much larger than that of the normal speckles. The one-dimensional simulations show that as the roughness of the random surface sample increases or its lateral correlation length decreases, the flakes go farther away from the axis, their relative intensities increase, their sizes become bigger and the fluctuations in them decrease. A sub-scatterer model that we call isoclinic element is proposed to explain the formation and properties of flakes. Experimental evidence shows the existence of the flake structure. |
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