  Quantum information processing and integrated nanophotonics require robust
generation of single photon emitters on demand. In this work we demonstrate
that diamond films grown by microwave plasma chemical vapour deposition on a
silicon substrate host bright, narrowband single photon emitters in the visible
to near infrared spectral range. The emitters possess fast lifetime, absolute
photostability, and exhibit full polarization at excitation and emission.
Pulsed and continuous laser excitations confirm their quantum behaviour at room
temperature, while low temperature spectroscopy is done to investigate their
inhomogeneous broadening. Our results advance the knowledge of solid state
single photon sources and open pathways for their practical implementation in
quantum communication and quantum information processing.
