Newman Jason A, Webb Kevin J
School of Electrical and Computer Engineering, Purdue University 465 Northwestern Avenue, West Lafayette, Indiana 47907-1285, USA.
Phys Rev Lett. 2014 Dec 31;113(26):263903. doi: 10.1103/PhysRevLett.113.263903. Epub 2014 Dec 30.
Coherent imaging and communication through or within heavily scattering random media has been considered impossible due to the randomization of the information contained in the scattered electromagnetic field. We report a remarkable result based on speckle correlations over incident field position that demonstrates that the field incident on a heavily scattering random medium can be obtained using a method that is not restricted to weak scatter and is, in principle, independent of the thickness of the scattering medium. Natural motion can be exploited, and the approach can be extended to other geometries. The near-infrared optical results presented indicate that the approach is applicable to other frequency regimes, as well as other wave types. This work presents opportunities to enhance communication channel capacity in the large source and detector number regime, for a new method to view binary stars from Earth, and in biomedical applications.
由于散射电磁场中所含信息的随机化，通过强散射随机介质或在其内部进行相干成像和通信一直被认为是不可能的。我们基于入射场位置上的散斑相关性报告了一个显著结果，该结果表明，使用一种不限于弱散射且原则上与散射介质厚度无关的方法，可以获取入射到强散射随机介质上的场。可以利用自然运动，并且该方法可以扩展到其他几何结构。所展示的近红外光学结果表明，该方法适用于其他频率范围以及其他波型。这项工作为在大源和探测器数量的情况下提高通信信道容量、提供一种从地球上观测双星的新方法以及在生物医学应用方面带来了机遇。
