LKB - Optical Imaging in biogical and complex media


  • G. Volpe, L. Kurz, A. Callegari, G. Volpe, S. Gigan, Speckle Optical Tweezers: Micromanipulation with Random Light Fields, Opt. Express 22, 18159-18167 (2014) OE
  • G. Volpe, G. Volpe, S. Gigan, Brownian Motion in a Speckle Light Field : Tunable Anomalous Diffusion and Selective Optical Manipulation, Scientific Reports, 4 : 3936 (2014) SCIREP ARXIV

Microfluidics : Optical manipulation using speckle
(collab. G. Volpe, Bilkent University, Turkey)




Optical trapping and manipulation of micro- or nanosized particles in liquids are routinely performed and have emerged as a very interesting tool in microfluidics for instance. However, they rely on carefully controlled optical focus and expensive and cumbersome setups. Speckle fields naturally provide a random trapping potential, yet with well-defined statistical properties. We study how the Brownian motion of particules in microfluidic environnement are modified and how we can deterministically trap and guide particules using speckles.

  • P. Bondareff, G. Volpe, S. Gigan, S. Grésillon, Probing extended modes on disordered plasmonic networks by wavefront shaping, ACS Photonics  2, 1658 (2015) link

Plasmonics : Wavefront control in disordered plasmonic systems
(in collaboration with S. Grésillon @institut Langevin)


Plasmons, which are hybrid electronic and photonic states localized at the interfaces between dielectric and metallic structures, are promising candidates for sensors or light matter interaction. Disordered metallic films have been very interesting systems for plasmon studies, at the crossing between localized plasmons (on metallic nanostructures) and propagating plasmons (on metallic films). We study how wavefront shaping can provide information about the plasmon propagation on such structures, allow deterministic far-field control of plasmons, and focusing.