中国物理B ›› 2019, Vol. 28 ›› Issue (5): 57803-057803.doi: 10.1088/1674-1056/28/5/057803

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Large-scale control of enhancement and quenching of photoluminescence for ZnSe/ZnS quantum dots and Ag nanoparticles in aqueous solution

Shaoyi Yin(殷少轶), Liming Liao(廖李明), Song Luo(罗松), Zhe Zhang(张喆), Xiaoyu Zhang(张晓宇), Jian Lu(鹿建), Zhanghai Chen(陈张海)   

  1. 1 State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China;
    2 Research Center of Quantum Macro-Phenomenon and Application, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • 收稿日期:2019-01-10 修回日期:2019-02-20 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Zhanghai Chen E-mail:zhanghai@fudan.edu.cn
  • 基金资助:

    Project supported by the National Key R&D Program of China (Grant No. 2018YFA0306304) and the National Natural Science Foundation of China (Grant No. 11674069).

Large-scale control of enhancement and quenching of photoluminescence for ZnSe/ZnS quantum dots and Ag nanoparticles in aqueous solution

Shaoyi Yin(殷少轶)1, Liming Liao(廖李明)1, Song Luo(罗松)1, Zhe Zhang(张喆)1, Xiaoyu Zhang(张晓宇)1, Jian Lu(鹿建)2, Zhanghai Chen(陈张海)1   

  1. 1 State Key Laboratory of Surface Physics, Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education), Department of Physics, Collaborative Innovation Center of Advanced Microstructures, Fudan University, Shanghai 200433, China;
    2 Research Center of Quantum Macro-Phenomenon and Application, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • Received:2019-01-10 Revised:2019-02-20 Online:2019-05-05 Published:2019-05-05
  • Contact: Zhanghai Chen E-mail:zhanghai@fudan.edu.cn
  • Supported by:

    Project supported by the National Key R&D Program of China (Grant No. 2018YFA0306304) and the National Natural Science Foundation of China (Grant No. 11674069).

摘要:

We investigated the optical properties of hybrid exciton-plasmon coupling ensembles composed of ZnSe/ZnS quantum dots and Ag nanoparticles in aqueous solution. We modulated their average interval by changing the ratio of quantum dots and Ag nanoparticles. The transition from dramatic PL enhancement to PL quenching state was experimentally observed, according to the continuous decrease of the PL lifetime. The PL enhancement rate exceeded 10, with the Purcell factor of 3.5. Meanwhile, the proportion of fast decay increased from 0.3 to 0.6, corresponding to the proportion of slow decay decreased from 0.7 to 0.4. Our experiment is important for the hybrid exciton-plasmon coupling system to be practicable in optoelectronic application.

关键词: ZnSe/ZnS quantum dots, enhancement and quenching, localized surface plasmons, aqueous solution

Abstract:

We investigated the optical properties of hybrid exciton-plasmon coupling ensembles composed of ZnSe/ZnS quantum dots and Ag nanoparticles in aqueous solution. We modulated their average interval by changing the ratio of quantum dots and Ag nanoparticles. The transition from dramatic PL enhancement to PL quenching state was experimentally observed, according to the continuous decrease of the PL lifetime. The PL enhancement rate exceeded 10, with the Purcell factor of 3.5. Meanwhile, the proportion of fast decay increased from 0.3 to 0.6, corresponding to the proportion of slow decay decreased from 0.7 to 0.4. Our experiment is important for the hybrid exciton-plasmon coupling system to be practicable in optoelectronic application.

Key words: ZnSe/ZnS quantum dots, enhancement and quenching, localized surface plasmons, aqueous solution

中图分类号:  (II-VI semiconductors)

  • 78.55.Et
68.65.Hb (Quantum dots (patterned in quantum wells)) 73.20.Mf (Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)) 42.50.Pq (Cavity quantum electrodynamics; micromasers)