Controlling light emission by a thermalized ensemble of colloidal quantum dots with a metasurface

Hector Monin (1) , Aurelian Loirette-Pelous (1) , Eva de Leo (2) , Aurelio A Rossinelli (2) , Ferry Prins (2) , David J Norris (2) , Elise Bailly (1) , Jean-Paul Hugonin (1) , Benjamin Vest (1) , Jean-Jacques Greffet (1)

1 Laboratoire Charles Fabry / Nanophotonique
2 D-MAVT - Department of Mechanical and Process Engineering [Zürich]

We report an experimental and theoretical study of light emission by a patterned ensemble of colloidal quantum dots (cQDs). This system modifies drastically the emission spectrum and polarization as compared to a planar layer of cQDs. It exhibits bright, directional and polarized emission including a degree of circular polarization in some directions. We introduce a model of light emission based on a local Kirchhoff law which reproduces accurately all the features of the experiment. The model provides a figure of merit to assess quantitatively the emitted power. This work paves the way to the systematic design of efficient ultrathin light emitting metasurfaces with controlled polarization, spectrum and directivity.

Domains: Optics [physics.optics]

Hector Monin, Aurelian Loirette-Pelous, Eva de Leo, Aurelio A Rossinelli, Ferry Prins, et al.. Controlling light emission by a thermalized ensemble of colloidal quantum dots with a metasurface. Optics Express, 2023, 31 (3), pp.4851. ⟨10.1364/oe.471744⟩. ⟨hal-03964396⟩