Exploiting the Time-Reversal Operator for Adaptative Optics, Selective Focusing and Scattering Pattern Analysis

Sébastien Popoff (1) , Alexandre Aubry (1) , Geoffroy Lerosey (1) , Mathias Fink (1) , Albert-Claude Boccara (1) , Sylvain Gigan (1)

1 IL - Institut Langevin - Ondes et Images (UMR7587)

We report on the experimental measurement of the backscattering matrix of a weakly scattering medium in optics, composed of a few dispersed gold nanobeads. The DORT method (Decomposition of the Time Reversal Operator) is applied to this matrix and we demonstrate selective and efficient focusing on individual scatterers, even through an aberrating layer. Moreover, we show that this approach provides the decomposition of the scattering pattern of a single nanoparticle. These results open important perspectives for optical imaging, characterization and selective excitation of nanoparticles.

Mots clés: backscattering matrix; wavefront shaping; focusing; scattering pattern

Domaines: Optique [physics.optics]

Sébastien Popoff, Alexandre Aubry, Geoffroy Lerosey, Mathias Fink, Albert-Claude Boccara, et al.. Exploiting the Time-Reversal Operator for Adaptative Optics, Selective Focusing and Scattering Pattern Analysis. 2011. ⟨hal-00613643v2⟩