| CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES |
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Photostability of colloidal single photon emitter in near-infrared regime at room temperature |
| Si-Yue Jin(靳思玥)1,2 and Xing-Sheng Xu(许兴胜)1,2,3,† |
1 Key Laboratory of Optoelectronic Materials and Devices, Chinese Academy of Sciences, Beijing 100083, China;
2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China;
3 Hefei National Laboratory, Hefei 230088, China |
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Abstract The photostability of a colloidal single photon emitter in near-infrared regime at room temperature is investigated. The fluorescence lifetime, blinking phenomenon, and anti-bunching effect of a single CdTeSe/ZnS quantum dot with an emission wavelength of 800 nm at room temperature are studied. The second-order correlation function at zero delay time is much smaller than 0.1, which proves that the emission from single quantum dots at 800 nm is a highly pure single-photon source. The effects of the irradiation duration on the fluorescence from single quantum dots are analyzed. The experimental results can be explained by a recombination model including a multi-nonradiative recombination center model and a multi-charged model.
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Received: 14 August 2023
Revised: 19 October 2023
Accepted manuscript online: 29 November 2023
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PACS:
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61.46.Df
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(Structure of nanocrystals and nanoparticles ("colloidal" quantum dots but not gate-isolated embedded quantum dots))
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61.46.Hk
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(Nanocrystals)
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78.55.-m
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(Photoluminescence, properties and materials)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 92165202), the Innovation Program for Quantum Science and Technology, China (Grant No. 2021ZD0300701), and the Strategic Priority Research Program (A) of Chinese Academy of Sciences (Grant No. XDA18040300). |
Corresponding Authors:
Xing-Sheng Xu
E-mail: xsxu@semi.ac.cn
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Cite this article:
Si-Yue Jin(靳思玥) and Xing-Sheng Xu(许兴胜) Photostability of colloidal single photon emitter in near-infrared regime at room temperature 2024 Chin. Phys. B 33 036102
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