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 CdTeSe nanocrys- tals, embedded in a silica opaline structure by infiltration of a highly diluted solution. Strong modification of emission diagrams of embedded nanocrystals have been observed in good agree- ment with theoretical models. At macroscopic scale, we measured the difference of lifetime between an opal infiltrated with nanocrystals with emission wavelength in the pseudogap and an opal with smaller balls size for which the nanocrystal emission wavelength is outside the pseudogap. The photonic bandgap effect leads a lifetime increase of the order of 10%. These lifetime variations are shown to be in good agreement with the calculated local density of states modication due to the pseudogap.

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-00323927v3⟩