European Laboratory for Nonlinear Spectroscopy(LENS);
50019 Sesto Fiorentino;
Italy;
National Institute of Optics(CNR-INO);
50019 Sesto Fiorentino;
Italy;
Dipartimento di Fisica ed Astronomia;
Universitàdegli Studi di Firenze;
50019 Sesto Fiorentino;
Italy;
Center for Quantum Science and Technology in Arcetri(QSTAR);
50125 Florence;
Italy;
Institute of Nanotechnology;
Karlsruhe Institute of Technology(KIT);
76344 Eggenstein-Leopoldshafen;
Germany;
Institute of Physics;
University of Muenster;
48149 Muenster;
Germany;
The Blackett Laboratory;
Department of Physics;
Imperial College London;
London SW72AZ;
UK;
Laboratory of Nano-Optics;
University of Siegen;
57072 Siegen;
Germany;
collection efficiency; fluorescence microscopy; optical nano-antennas; single molecule;