  Single photon emitters with narrow linewidths are highly sought after for
applications in quantum information processing and quantum communications. In
this letter, we report on a bright, highly polarized near infrared single
photon emitter embedded in diamond nanocrystals with a narrow, sub GHz optical
linewidths at 10K. The observed zero phonon line at ~ 780 nm is optically
stable under low power resonant excitation and blue shifts as the excitation
power increases. Our results highlight the prospect for using new near infrared
color centers in nanodiamonds for quantum applications.
