Pronounced Purcell enhancement of spontaneous emission in CdTe/ZnTe   quantum dots embedded in micropillar cavities
  The coupling of CdTe/ZnTe quantum dot (QD) emission to micropillar cavity eigenmodes in the weak coupling regime is demonstrated. We analyze photoluminescence spectra of QDs embedded in monolithic micropillar cavities based on Bragg mirrors which contain MgSe/ZnTe/MgTe superlattices as low-index material. The pillar emission shows pronounced cavity eigenmodes and their spectral shape is in good agreement with simulations. QD emission in resonance with the cavity mode is shown to be efficiently guided toward the detector and an experimental Purcell enhancement by a factor of 5.7 is determined, confirming theoretical expectations. 
Tomasz Jakubczyk, Wojciech Pacuski, Tomasz Smole\'nski, Andrzej   Golnik, Matthias Florian, Frank Jahnke, Carsten Kruse, Det...
cond-mat.mes-hall physics.optics