This first volume in the new "Springer Series on Fluorescence" brings together fundamental and applied research from this highly interdisciplinary field ranging from chemistry and physics to biology and medicine. Special attention is given to supramolecular systems, sensor applications, confocal microscopy and protein-protein interactions. This carefully edited collection of state-of-the-art articles will serve as an invaluable tool for practitioners and novices and provide inspiration for new developments and applications.