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Triggered single-photon emission and cross-correlation properties in InAlAs quantum dot |
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| Authors: | Hidekazu Kumano Satoshi Kimura Michiaki Endo Ikuo Suemune Hirotaka Sasakura Satoru Adachi Shunichi Muto Hai Zhi Song Shinichi Hirose Tatsuya Usuki |
| Institution: | aResearch Institute for Electronic Science, Hokkaido University N21 W10, Sapporo 001-0021, Japan;bCREST, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan;cDepartment of Applied Physics, Hokkaido University N13 W8, Sapporo 060-8628, Japan;dFujitsu Ltd., 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan;eFujitsu Labs Ltd., 10-1 Morinosato-Wakamiya, Atsugi 243-0197, Japan |
| 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: | Single-photon emission Si-APD Quantum key distribution (QKD) Free-space communication |
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