Single-photon emission at liquid nitrogen temperature from a single InAs/GaAs quantum dot

We report on the single photon emission from single InAs/GaAs self-assembled Stranski-Krastanow quantum dots up to 80K under pulsed and continuous wave excitations. At temperature 80 K, the second-order correlation function at zero time delay, g((2))(0), is measured to be 0.422 for pulsed excitation. At the same temperature under continuous wave excitation, the photon antibunching effect is observed. Thus, our experimental results demonstrate a promising potential application of self-assembled InAs/GaAs quantum dots in single photon emission at liquid nitrogen temperature.

National Natural Science Foundation of China 60676054 1073406060625405National Basic Research Programme of China 2007CB924904 Knowledge Innovation Programme of Chinese Academy of Sciences KJCX2.YW.W09-1 Supported by the National Natural Science Foundation of China under Grant Nos 60676054, 10734060 and 60625405, and the National Basic Research Programme of China under Grant No 2007CB924904, and the Knowledge Innovation Programme of Chinese Academy of Sciences under Grant No KJCX2.YW.W09-1.