Created by sebastien.popoff on 15/04/2019
Wavefront shaping in complex media for analog computation[M. W. Matthès et al., Optica, 6 (2019)] Performing linear operations using optical devices is a crucial building block in many fields ranging from telecommunications to optical analog computation and machine learning. For many of these applications, key requirements are robustness to fabrication inaccuracies, reconfigurability, and scalability. Traditionally, the conformation or the structure of the medium is optimized in order to perform a given desired operation. Since the advent of wavefront shaping, we know that the complexity of a given operation can be shifted toward the engineering of the wavefront, allowing, for example, to use any random medium as a lens. |
Created by sebastien.popoff on 21/05/2017
Wavefront Shaping in Complex Media:
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Created by sebastien.popoff on 26/12/2016
Controlling Light in Complex MediaSebastien M. PopoffLOM Master SeminarFriday, November 26 2016Abstract: Seminar talk about the control of light in scattering media for focusing and imaging applications. |
Created by sebastien.popoff on 01/07/2014
From diffusive to ballistic-like transport in absorbing media[S.F. Liew et al., Phys. Rev. B, 89, (2013)] Intuitively, absorption of light is detrimental for imaging as it reduces the intensity of the image we see. On the other hand, scattering is also a known obstacle for imaging as it mixes light sending it in all the directions. In the present paper, S.F. Liew and his collaborators from Yale University (CT, USA) and the University of Twente (The Netherlands) show that, contrary to appearances, absorption can in fact help light to follow a direct path through disordered media. |