Abstract
We demonstrate the ability to control the spontaneous emission dynamics of self-assembled quantum dots via the local density of optical modes in two-dimensional (2D) photonic crystals. We show that an incomplete 2D photonic band gap is sufficient to significantly lengthen the spontaneous emission lifetime over a wide bandwidth . For dots that are both spectrally and spatially coupled to strongly localized , high optical modes, we have directly measured a strong Purcell-enhanced shortening of the emission lifetime , limited only by our temporal resolution. Analysis of the spectral dependence of the recombination dynamics shows a maximum lifetime shortening of . From the directly measured enhancement and suppression we show that the single-mode coupling efficiency for quantum dots in such structures is at least and is estimated to be as large as .
- Received 22 December 2004
DOI:https://doi.org/10.1103/PhysRevB.71.241304
©2005 American Physical Society