Second-order statistics of non-Gaussian fluctuations of coherent waves reflected from disordered media
نویسندگان
چکیده
منابع مشابه
Second-order statistics of non-Gaussian fluctuations of coherent waves reflected from disordered media.
We show that the second-order statistics of speckle patterns of scalar waves, multiply scattered on reAection by disordered media, may be non-Gaussian, even though the first-order statistics are Gaussian. This occurs at intermediate sizes of the illuminated samples of the medium that are large enough to produce Gaussian first-order statistics of the scattered field but are small enough to break...
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We study the intensity angular correlation function of scalar waves, scattered on reAection from disordered media, for the case in which the sample is so small that the speckle pattern does not follow a joint Gaussian statistics, and thus the factorization approximation does not hold. An enhanced long-range correlation is predicted that exhibits two peaks due to coherent effects analogous to th...
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چکیده: فرض کنید که تابعی از اپسیلون یک مجموع نامتناهی از احتمالات موزون مربوط به مجموع های جزئی براساس یک دنباله از متغیرهای تصادفی مستقل و همتوزیع باشد، و همچنین فرض کنید توابعی مانند g و h وجود دارند که هرگاه امید ریاضی توان دوم x متناهی و امیدریاضی x صفر باشد، در این صورت می توان حد حاصلضرب این توابع را بصورت تابعی از امید ریاضی توان دوم x نوشت. حالت عکس نیز برقرار است. همچنین ما با استفاده...
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We present a diagrammatic theory for coherent backscattering from disordered dilute media in the nonlinear regime. We show that the coherent backscattering enhancement factor is strongly affected by the nonlinearity, and we corroborate these results by numerical simulations. Our theory can be applied to several physical scenarios such as scattering of light in a nonlinear Kerr medium or propaga...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 1993
ISSN: 0163-1829,1095-3795
DOI: 10.1103/physrevb.48.4132