Control over spontaneous emission of light is of great importance in quantum optics. It is essential for diverse applications such as miniature lasers, light-emitting diodes, and single-photon sources for quantum information. We present experimental studies on spontaneous emission of CdSe quantum dots (QDs) embedded in 3D photonic crystals consisting of air spheres in titanium dioxide. Performing time-resolved experiments, we show that the photonic crystals control the emission decay rate of excitons confined in the QDs1,2. By varying the lattice parameter of the photonic crystals, we demonstrate both broadband inhibition and enhancement of the decay rate for an ensemble of QDs. Our experimental data are compared to density of states calculations. The work lays the foundation for all-solid-state dynamic control of optical quantum systems.
|Publication status||Published - 2005|
|Event||NanoDay DTU - Kgs. Lyngby, Denmark|
Duration: 8 Jun 2005 → …
|Period||08/06/2005 → …|