Infrared and Laser Engineering, Volume. 50, Issue 2, 20200342(2021)
Nonlinear optics and ultrafast dynamics characteristics of CdTe/CdS quantum dots with different core sizes and shell thickness
Figures & Tables(14)
Fig. 2. Open/closed aperture Z-scan normalized transmittance curves of water-soluble CdTe/CdS, S1-S2 quantum dots
Fig. 3. Open/closed aperture Z-scan normalized transmittance curves of water-soluble CdTe/CdS, S3-S4 quantum dots
Fig. 4. Open/closed aperture Z-scan normalized transmittance curves of water-soluble CdTe/CdS, S5-S6 quantum dots
Fig. 5. Transient absorption spectra of water-soluble CdTe/ CdS, S1-S2 quantum dots
Fig. 6. Transient absorption spectra of water-soluble CdTe/ CdS, S3-S4 quantum dots
Fig. 7. Transient absorption spectra of water-soluble CdTe/ CdS, S5-S6 quantum dots
Fig. 8. Ultrafast kinetic curves of water-soluble CdTe/CdS, S1-S2 quantum dots
Fig. 9. Ultrafast kinetic curves of water-soluble CdTe/CdS, S3-S4 quantum dots
Fig. 10. Ultrafast kinetic curves of water-soluble CdTe/CdS, S5-S6 quantum dots
Table 1. Six kinds of the CdTe/CdS core-shell quantum dots
View tableView in ArticleTable 1. Six kinds of the CdTe/CdS core-shell quantum dots
Sample number Quantum dots Size /nm Core color Cladding time S1 CdTe/CdS-1 3.2 Orange 30 min S2 CdTe/CdS-2 3.3 orange 1 h S3 CdTe/CdS-3 3.0 Yellow 30 min S4 CdTe/CdS-4 3.1 Yellow 1 h S5 CdTe/CdS-5 2.6 Green 30 min S6 CdTe/CdS-6 2.7 Green 1 h
Table 2. Nonlinear optical parameters obtained from Z-scan measurement data for CdTe/CdS quantum dots
View tableView in ArticleTable 2. Nonlinear optical parameters obtained from Z-scan measurement data for CdTe/CdS quantum dots
Sample name Core color Shell Size/nm β /10-13 m·W-1n 2/10−12esuχ 3/10−14esuS1 Orange CdS-30 min 3.2 4.39 1.42 3.85 S2 Orange CdS-1 h 3.3 5.01 1.49 4.12 S3 Yellow CdS-30 min 3.0 5.07 1.38 3.90 S4 Yellow CdS-1 h 3.1 5.29 1.85 4.92 S5 Green CdS-30 min 2.6 5.23 1.18 3.58 S6 Green CdS-1 h 2.7 6.42 1.73 4.92
Table 3. CdTe/CdS quantum dots fitting parameters
View tableView in ArticleTable 3. CdTe/CdS quantum dots fitting parameters
Sample name Size τ- rise/psτ 1/psτ S1 3.2 0.34 1.06 17.81 S2 3.3 0.33 1.98 18.43 S3 3.0 0.35 1.13 13.79 S4 3.1 0.59 2.13 38.24 S5 2.6 0.31 1.74 12.77 S6 2.7 0.32 1.79 16.78
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Qing Chang, Hengyu Tan, Tianming Meng. Nonlinear optics and ultrafast dynamics characteristics of CdTe/CdS quantum dots with different core sizes and shell thickness[J]. Infrared and Laser Engineering, 2021, 50(2): 20200342
Paper Information
Category: Lasers and laser optics
Received: Oct. 6, 2020
Accepted: --
Published Online: Mar. 22, 2021
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