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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 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 |
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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.
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Received: 13 March 2022
Revised: 03 May 2022
Accepted manuscript online: 29 May 2022
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PACS:
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42.25.Ja
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(Polarization)
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42.68.Mj
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(Scattering, polarization)
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42.70.Nq
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(Other nonlinear optical materials; photorefractive and semiconductor materials)
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Corresponding Authors:
Yunqing Lu, Jin Wang
E-mail: luyq@njupt.edu.cn;jinwang@njupt.edu.cn
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Cite this article:
Kang Yang(杨康), Huiqing Hu(胡回清), Jiaojiao Wang(王娇娇), Lingling Deng(邓玲玲), Yunqing Lu(陆云清), and Jin Wang(王瑾) A simulation study of polarization characteristics of ultrathin CsPbBr3 nanowires with different cross-section shapes and sizes 2023 Chin. Phys. B 32 024214
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