Nanostructures and Optics – Coupled nano-emitters

List of members


Internships and jobs





  • Permanent members: Laurent Coolen, Agnès Maître
  • PhD students: Arnaud Choux, Jiawen Liu, Zakarya Ouzit


Our group has a long history of analyzing radiation properties of individual quantum nano-emitters by fluorescence microscopy. In particular, we developed characterization tools based on polarimetry and Fourier imaging [1] and used them to measure the orientation of single nanorods and nanoplatelets [2,3]. We have now turned our attention to the emission of self-assembled chains of nanoplatelets (synthesis B. Abécassis, ENS de Lyon). Emitters within a few nanometers from each other present many potential collective interaction mechanisms which must be understood for opto-electronic applications : mechanical (ligand-induced strain), electronic (charge transfer, dipole-dipole coupling), optical (lasing, superradiance) etc. We have recently shown that self-assembled platelets present very fast (picosecond) Förster transfer so that excitons can diffuse over 500 nm within a platelet chain [4].


Figure: FRET diffusion of excitons along a self-assembled chain of nanoplatelets


  • Benjamin Abécassis, ENS de Lyon
  • Benoît Fleury, IPCM, Sorbonne Université
  • Benoît Dubertret, Sandrine Ithurria, LPEM, ESPCI



[1] Clotilde Lethiec, Julien Laverdant, Henri Vallon, Clémentine Javaux, Benoît Dubertret, et al.. Measurement of Three-Dimensional Dipole Orientation of a Single Fluorescent Nanoemitter by Emission Polarization Analysis. Physical Review X, American Physical Society, 2014, 4 (2), pp.021037. ⟨10.1103/PhysRevX.4.021037⟩. ⟨hal-01340131⟩

[2] Fu Feng, Loan Nguyen, Michel Nasilowski, Brice Nadal, Benoit Dubertret, et al.. Consequence of shape elongation on emission asymmetry for colloidal CdSe/CdS nanoplatelets. Nano Research, Springer, In press, pp.1-10. ⟨10.1007/s12274-017-1926-3⟩. ⟨hal-01700922⟩

[3] Fu Feng, Loan Nguyen, Michel Nasilowski, Brice Nadal, Benoît Dubertret, et al.. Probing the Fluorescence Dipoles of Single Cubic CdSe/CdS Nanoplatelets with Vertical or Horizontal Orientations. ACS photonics, American Chemical Society,, 2018, 5 ( 5), pp.1994-1999. ⟨10.1021/acsphotonics.7b01475⟩. ⟨hal-01777981⟩

[4] Jiawen Liu, Lilian Guillemeney, Benjamin Abecassis, Laurent Coolen. Long Range Energy Transfer in Self-Assembled Stacks of Semiconducting Nanoplatelets. Nano Letters, American Chemical Society, 2020, ⟨10.1021/acs.nanolett.0c00376⟩. ⟨hal-02565031⟩

[5] Jiawen Liu, Lilian Guillemeney, Arnaud Choux, Agnès Maitre, Benjamin Abécassis, et al.. Fourier-imaging of single self-assembled CdSe nanoplatelet chains and clusters reveals out-of-plane dipole contribution. ACS photonics, American Chemical Society,, 2020, 7 (10), pp.2825-2833. ⟨10.1021/acsphotonics.0c01066⟩. ⟨hal-02975054⟩