Author/Authors :
Hidekazu Kumano، نويسنده , , Satoshi Kimura، نويسنده , , Michiaki Endo، نويسنده , , Ikuo Suemune?، نويسنده , , Hirotaka Sasakura، نويسنده , , Satoru Adachi، نويسنده , ,
Shunichi Muto، نويسنده , , Hai Zhi Song، نويسنده , , Shinichi Hirose، نويسنده , , Tatsuya Usuki، نويسنده ,
Abstract :
Triggered single-photon generation from InAlAs quantum dot (QD) was demonstrated for the first time. Emitted photon energy coincides with high detection efficiency range of Si single-photon detectors, which is highly suitable for free-space communication. Single-QD spectroscopy and crossed photon correlation measurements unambiguously revealed that several emitting lines observed in a single mesa structure originated from the identical QD, and two temporary competing decay processes associated with neutral states and charged states were identified. Presence of the competing process is also inferred from an analysis of steady-state photoluminescence intensities. Formation process of charged exciton in QD is also discussed.
Keywords :
Si-APD , Single-photon emission , Quantum key distribution (QKD) , Free-space communication
