Photon correlation studies of single GaN quantum dots
  We present measurements of the second-order coherence function on emission from single GaN quantum dots. In some cases a large degree of photon antibunching is observed, demonstrating isolation of a single quantum system. For a selected quantum dot, we study the dependence of photon antibunching on excitation power and temperature. Using pulsed excitation, we demonstrate an ultraviolet triggered single-photon source operating at a wavelength of 358 nm. 
Charles Santori, Stephan Gotzinger, Yoshihisa Yamamoto, Satoshi Kako,   Katsuyuki Hoshino, Yasuhiko Arakawa