Properties of Speckle Intensities in Near-Field Optical Regions by Numerical Solutions of Wave Equations
CHENG Chuan-Fu1,2, REN Xiao-Rong2, LIU Chun-Xiang2, ZHANG Ning-Yu3, TENG Shu-Yun1, XU Zhi-Zhan1
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 200-811, Shanghai 201800
2Department of Physics, Shandong Normal University, Jinan 250014
3Shandong Institute of Architecture and Engineering, Jinan 250014
Properties of Speckle Intensities in Near-Field Optical Regions by Numerical Solutions of Wave Equations
1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, PO Box 200-811, Shanghai 201800
2Department of Physics, Shandong Normal University, Jinan 250014
3Shandong Institute of Architecture and Engineering, Jinan 250014
Abstract： Starting from the electromagnetic wave equations and boundary conditions and using Green’s integral theorem, we implement the rigorous numerical solutions of the speckle field produced by scattering of dielectric random surfaces in the optical near-field. The average sizes of speckle granules are enlarged very quickly with the increase of the distance in the range less than a wavelength. It is found that the speckle contrast in the near-field and in the neighbourhood region is inversely proportional to the square of lateral correlation length at its large values and linearly decreases with the roughness exponent.
CHENG Chuan-Fu;REN Xiao-Rong;LIU Chun-Xiang;ZHANG Ning-Yu;TENG Shu-Yun;XU Zhi-Zhan. Properties of Speckle Intensities in Near-Field Optical Regions by Numerical Solutions of Wave Equations[J]. 中国物理快报, 2004, 21(6): 1057-1060.
CHENG Chuan-Fu, REN Xiao-Rong, LIU Chun-Xiang, ZHANG Ning-Yu, TENG Shu-Yun, XU Zhi-Zhan. Properties of Speckle Intensities in Near-Field Optical Regions by Numerical Solutions of Wave Equations. Chin. Phys. Lett., 2004, 21(6): 1057-1060.
2004, Vol. 21 
