Makris Konstantinos G, Brandstötter Andre, Ambichl Philipp, Musslimani Ziad H, Rotter Stefan
Crete Center for Quantum Complexity and Nanotechnology, Department of Physics, University of Crete, Heraklion 71003, Greece.
Institute for Theoretical Physics, Vienna University of Technology (TU-Wien), Vienna 1040, Austria.
Light Sci Appl. 2017 Sep 8;6(9):e17035. doi: 10.1038/lsa.2017.35. eCollection 2017 Sep.
A fundamental manifestation of wave scattering in a disordered medium is the highly complex intensity pattern the waves acquire due to multi-path interference. Here we show that these intensity variations can be entirely suppressed by adding disorder-specific gain and loss components to the medium. The resulting constant-intensity waves in such non-Hermitian scattering landscapes are free of any backscattering and feature perfect transmission through the disorder. An experimental demonstration of these unique wave states is envisioned based on spatially modulated pump beams that can flexibly control the gain and loss components in an active medium.
无序介质中波散射的一个基本表现是，由于多路径干涉，波所获得的强度图案高度复杂。在此我们表明，通过向介质中添加特定于无序的增益和损耗分量，可以完全抑制这些强度变化。在这种非厄米散射环境中产生的等强度波没有任何背散射，并且具有通过无序区域的完美透射特性。基于能够灵活控制有源介质中增益和损耗分量的空间调制泵浦光束，设想了对这些独特波态的实验演示。
