Cover Picture: Spontaneous Emission Control in Micropillar Cavities Containing a Fluorescent Molecular Dye (Adv. Mater. 6/2006)



The cover depicts a micropillar microcavity containing a fluorescent organic dye, Lumogen Red, the fabrication of which is described on p. 742 by Lidzey and co-workers. The optical confinement resulting from the low-dimensionality of the pillar results in a number of effects, including an enhancement in spontaneous-emission rate. This process is confirmed using time-resolved scanning near-field optical microscopy. Such structures are of interest in the development of new types of low-threshold lasers and single-photon light sources for quantum cryptography.