Bret B P J, Lagendijk A
Universiteit Twente, Postbus 217, 7500AE Enschede, The Netherlands.
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Sep;70(3 Pt 2):036601. doi: 10.1103/PhysRevE.70.036601. Epub 2004 Sep 3.
The enhanced backscattering cone displaying a strong anisotropy from a material with anisotropic diffusion is reported. The constructive interference of the wave is preserved in the helicity preserving polarization channel and completely lost in the nonpreserving one. The internal reflectivity at the interface modifies the width of the backscatter cone. The reflectivity coefficient is measured by angular-resolved transmission. This interface property is found to be isotropic, simplifying the backscatter cone analysis. The material used is a macroporous semiconductor, gallium phosphide, in which pores are etched in a disordered position but with a preferential direction.
报道了从具有各向异性扩散的材料中观察到的增强后向散射锥，其显示出很强的各向异性。波的相长干涉在保持螺旋度的偏振通道中得以保留，而在非保持螺旋度的通道中则完全消失。界面处的内反射率改变了后向散射锥的宽度。反射系数通过角分辨透射来测量。发现这种界面特性是各向同性的，这简化了后向散射锥分析。所使用的材料是一种大孔半导体磷化镓，其中的孔在无序位置蚀刻，但具有优先方向。
