(ITMO University) A research group from ITMO University first time in the world developed a controlled light source based on nanodiamond. Experiments have shown that diamond shell doubles the emission speed light sources and helps to control them without any additional nano- and microstructures. This was achieved due to artificially created defects in a diamond crystal lattice. Obtained results are important for the development of quantum computers and optical networks. The work is published in the Nanoscale.