title: A self-adaptive method for creating high efficiency communication channels through random scattering media.
abstract: Controlling the propagation of electromagnetic waves is important to a broad range of applications. Recent advances in controlling wave propagation in random scattering media have enabled optical focusing and imaging inside random scattering media. In this work, we propose and demonstrate a new method to deliver optical power more efficiently through scattering media. Drastically different from the random matrix characterization approach, our method can rapidly establish high efficiency communication channels using just a few measurements, regardless of the number of optical modes, and provides a practical and robust solution to boost the signal levels in optical or short wave communications. We experimentally demonstrated analog and digital signal transmission through highly scattering media with greatly improved performance. Besides scattering, our method can also reduce the loss of signal due to absorption. Experimentally, we observed that our method forced light to go around absorbers, leading to even higher signal improvement than in the case of purely scattering media. Interestingly, the resulting signal improvement is highly directional, which provides a new means against eavesdropping.
authors: 1] HHMI Janelia Research Campus, 19700 Helix Drive, Ashburn, VA 20147, USA [2] State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou, 310027, China.
authors: Xiang
authors: X
authors: Hao
authors: HHMI Janelia Research Campus, 19700 Helix Drive, Ashburn, VA 20147, USA.
authors: Laure
authors: L
authors: Martin-Rouault
authors: HHMI Janelia Research Campus, 19700 Helix Drive, Ashburn, VA 20147, USA.
authors: Meng
authors: M
authors: Cui
mesh_terms: D060733:Electromagnetic Radiation; D006801:Humans; D055096:Optical Devices; D012542:Scattering, Radiation; D059629:Signal-To-Noise Ratio