Chinese Optics Letters, 2011, 9 (6): 062901, Published Online: May. 6, 2011
Light transmission in porous silicon dioxide filled with liquids of different refractive indices
传输平均自由程 透过率 多孔二氧化硅 290.1990 Diffusion 290.4210 Multiple scattering 290.5820 Scattering measurements 120.7000 Transmission
Abstract
Optical transmission at 532 nm from nonabsorbing disordered porous silicon dioxide has been studied experimentally. The transmission behaviors can be adjusted by filling the pores with liquids of different refractive indics, which are analyzed based on the theory of diffusion in a weak scattering regime. In our experiment, the transmission coefficient changes from a value less than 1% to one that is greater than 75%, that is, the opaque sample becomes transparent, which means that the transport mean free path of light within the material has been effectively adjusted. In addition, this method is a useful nondestructive method to derive the refractive index of an unknown bulk porous material.
Jun Li, Xinzheng Zhang, Fan Shi, Yan Xu, Pidong Wang, Xuanyi Yu, Jingjun Xu. Light transmission in porous silicon dioxide filled with liquids of different refractive indices[J]. Chinese Optics Letters, 2011, 9(6): 062901.