Enhanced amplified spontaneous emission from colloidal quantum dots in all-dielectric monolithic microcavities

We report enhanced amplified spontaneous emission from CdSe/ZnS (core/shell) quantum dots embedded in an all-dielectric microcavity. The vertical cavity surface emitting structure was grown via plasma enhanced chemical vapor deposition and the quantum dots were sandwiched in the cavity layer via dip coating. The enhancement in emission is observed when the cavity mode is in resonance with the biexciton energy. The microcavity shows a factor of two improvement in the slope efficiency of amplified spontaneous emission along with significant modification in the directionality of the emission. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4793753]