*Matthias Widmann1, Matthias Niethammer1, Dmitry Yu. Fedyanin2, Igor A. Khramtsov2, Torsten Rendler1, Ian D. Booker3, Jawad Ul Hassan3, Naoya Morioka1, Roland Nagy1, Yu-Chen Chen1, Ivan G. Ivanov3, Nguyen Tien Son3, Takeshi Ohshima4, Michel Bockstedte5,6, Adam Gali7, Cristian Bonato8, Sang-Yun Lee9, Jörg Wrachtrup1
(1. 3rd Inst. of Physics, Univ. of Stuttgart(Germany), 2. Lab. of Nanooptics and Plasmonics, Moscow Inst. of Physics and Tech.(Russia), 3. Dep. of Physics, Chemistry and Biology, Linköping Univ.(Sweden), 4. National Inst. for Quantum and Radiological Sci. and Tech.(Japan), 5. Dep. Chemistry and Physics of Materials, Univ. of Salzburg(Austria), 6. Solid State Theory, Univ. of Erlangen-Nuremberg(Germany), 7. Hungarian Academy of Sci., Wigner Research Centre for Physics(Hungary), 8. Inst. of Photonics and Quantum Sci., SUPA, Heriot-Watt Univ.(UK), 9. Center for Quantum Information, Korea Inst. of Sci. and Tech.(Korea))