2016/06/07 by Philipp del Hougne, Boshra Rajaei, Laurent Daudet +1 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Identification (biology) #Metamaterials and Metasurfaces Applications #Microwave #Microwave Imaging and Scattering Analysis #Phase (matter) #Phase modulation #Phase retrieval #Pulse shaping #Random lasers and scattering media #Reflection (computer programming) #Transmission (telecommunications) #Wavefront #physics.class-ph #physics.optics
paper · pdf · doi:10.1364/oe.24.018631
11 pages, 5 figures
arxiv created 2016/06/07 · openalex created_date 2016/06/24 · openalex publication_date 2016/08/04 · arxiv updated 2016/08/24 · openalex updated_date 2026/08/06
Transmission matrices (TMs) have become a powerful and widely used tool to describe and control wave propagation in complex media. In certain scenarios the TM is partially uncontrollable, complicating its identification and use. In standard optical wavefront shaping experiments, uncontrollable reflections or imperfect illumination may be the cause; in reverberating cavities, uncontrollable reflections off the walls have that effect. Here we employ phase retrieval techniques to identify such a partially uncontrollable TM solely based on random intensity-only reference measurements. We demonstrate the feasibility of our method by focusing both on a single target as well as on multiple targets in a microwave cavity, using a phase-binary Spatial-Microwave-Modulator.