中国物理B ›› 2023, Vol. 32 ›› Issue (2): 24214-024214.doi: 10.1088/1674-1056/ac744d

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A simulation study of polarization characteristics of ultrathin CsPbBr3 nanowires with different cross-section shapes and sizes

Kang Yang(杨康)1, Huiqing Hu(胡回清)1, Jiaojiao Wang(王娇娇)1, Lingling Deng(邓玲玲)2, Yunqing Lu(陆云清)2,†, and Jin Wang(王瑾)1,‡   

  1. 1 School of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 School of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • 收稿日期:2022-03-13 修回日期:2022-05-03 接受日期:2022-05-29 出版日期:2023-01-10 发布日期:2023-01-18
  • 通讯作者: Yunqing Lu, Jin Wang E-mail:luyq@njupt.edu.cn;jinwang@njupt.edu.cn

A simulation study of polarization characteristics of ultrathin CsPbBr3 nanowires with different cross-section shapes and sizes

Kang Yang(杨康)1, Huiqing Hu(胡回清)1, Jiaojiao Wang(王娇娇)1, Lingling Deng(邓玲玲)2, Yunqing Lu(陆云清)2,†, and Jin Wang(王瑾)1,‡   

  1. 1 School of Telecommunication and Information Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
    2 School of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China
  • Received:2022-03-13 Revised:2022-05-03 Accepted:2022-05-29 Online:2023-01-10 Published:2023-01-18
  • Contact: Yunqing Lu, Jin Wang E-mail:luyq@njupt.edu.cn;jinwang@njupt.edu.cn

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摘要： The polarization characteristics of ultrathin CsPbBr3 nanowires are investigated. Especially, for the height of cross-section of nanowires between 2 nm and 25 nm, the normalized intensity and polarization ratio ρ of CsPbBr3 nanowires with triangular, square and hexagonal cross-section shapes are compared. The results show that, along with the increase of the height of cross-section, the polarization ratios of these three nanowires decrease until T=15 nm, and increase afterwards. Also, along with the increase of the cross-section area up to 100 nm2, the polarization ratios of these three nanowires increase too. In general, for the same height or area, the polarization ratio ρ of these nanowires follows ρhexagon>ρsquare>ρtriangle. Therefore, the nanowire with the hexagonal cross-section should be chosen, where for a cross-section height of 2 nm and a length-height ratio of 20:1, the maximal polarization ratio is 0.951 at the longitudinal center of the NW. Further, for the hexagonal NW with a cross-section height of 10 nm, the hexagonal NW with a length-height ratio of 45:1 exhibits the maximal polarization ratio at the longitudinal center of the NW. These simulation results predict the feasible size and shape of CsPbBr3 nanowire devices with high polarization ratios.

关键词: CsPbBr3, nanowire, polarization characteristics

Abstract: The polarization characteristics of ultrathin CsPbBr3 nanowires are investigated. Especially, for the height of cross-section of nanowires between 2 nm and 25 nm, the normalized intensity and polarization ratio ρ of CsPbBr3 nanowires with triangular, square and hexagonal cross-section shapes are compared. The results show that, along with the increase of the height of cross-section, the polarization ratios of these three nanowires decrease until T=15 nm, and increase afterwards. Also, along with the increase of the cross-section area up to 100 nm2, the polarization ratios of these three nanowires increase too. In general, for the same height or area, the polarization ratio ρ of these nanowires follows ρhexagon>ρsquare>ρtriangle. Therefore, the nanowire with the hexagonal cross-section should be chosen, where for a cross-section height of 2 nm and a length-height ratio of 20:1, the maximal polarization ratio is 0.951 at the longitudinal center of the NW. Further, for the hexagonal NW with a cross-section height of 10 nm, the hexagonal NW with a length-height ratio of 45:1 exhibits the maximal polarization ratio at the longitudinal center of the NW. These simulation results predict the feasible size and shape of CsPbBr3 nanowire devices with high polarization ratios.

Key words: CsPbBr3, nanowire, polarization characteristics

中图分类号:  (Polarization)

  • 42.25.Ja
42.68.Mj (Scattering, polarization) 42.70.Nq (Other nonlinear optical materials; photorefractive and semiconductor materials)