Manipulating emission of CdSe/ZnS nanocrystals embedded in 3D photonic crystals

Céline Vion (1) , Carlos Barthou (1) , Paul Bénalloul (1) , Catherine Schwob (1) , Laurent Coolen (1) , Alex Gruzintev (2) , Gennadi Emelchenko (3) , Wladimir Masalov (3) , Jean-Marc Frigerio (1) , Agnès Maître (1)

1 INSP - Institut des Nanosciences de Paris
2 Institut of Microelectronics Technology and High Purity Materials
3 ISSP - Osipyan Institute of Solid State Physics

We report experimental and theoretical results on the photoluminescence of CdSe/ZnS core-shell nanocrystals, embedded in a silica opaline structure by infiltration of a highly diluted solution. In comparison to the emission of nanocrystals in an homogeneous medium, strong modification of emission diagrams and increase of the lifetime (16%) of embedded nanocrystals have been observed. Those experimental results are compared to theoretical models, showing good agreement for the emission diagram. On the other hand, the lifetime variation cannot be explained just by modifications of photonic local density of states due to the photonic band gap, but modification of the dipole moment due to the local environment should be taken into account.

Domaines: Optique [physics.optics]

Céline Vion, Carlos Barthou, Paul Bénalloul, Catherine Schwob, Laurent Coolen, et al.. Manipulating emission of CdSe/ZnS nanocrystals embedded in 3D photonic crystals. 2008. ⟨hal-00323927v1⟩