Chinese Optics Letters, Volume. 23, Issue 1, 011601(2025)
Linear optical characterization of meter-size zinc sulfide polycrystal
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Fig. 1. (a) ZnS tablet with a size of 1 m × 2 m. (b) Polished transparent ZnS plate after HIP (Ø45 × 18 mm3). (c) Micro-structure from SEM and (d) surface morphology from SEM with the measured ZnS sample in the upper right corner (10 mm × 8 mm × 2 mm).
Fig. 2. (a) XRD patterns of the grown ZnS; (b) SEM image of the ZnS sample used for EDS analyses; (c) EDS analyses results for the sample shown in (b).
Fig. 3. Refractive index of ZnS polycrystalline along the growth direction.
Fig. 4. (a) ZnS transmission spectrum from the ultraviolet to infrared region. (b) Optical loss from 0.4–15 µm.
Table 1. Comparison of Measured and Fitted Refractive Indices
View tableView in ArticleTable 1. Comparison of Measured and Fitted Refractive Indices
λ (µm) Measured refractive index Fitted refractive index 0.4047 2.5281966 2.527736001 0.4358 2.4734018 2.474110722 0.4800 2.4221488 2.422468522 0.5461 2.3745115 2.374299764 0.5875 2.3544081 2.354088187 0.6438 2.3341786 2.33383809 0.7065 2.3178797 2.317632451 0.8521 2.2941409 2.294236568 1.0140 2.2794293 2.279861088 1.5300 2.2606278 2.260728303 2.3250 2.2505997 2.250516680
Table 2. Different Expressions of the ZnS Sellmeier Equation
View tableView in ArticleTable 2. Different Expressions of the ZnS Sellmeier Equation
Ref. Sellmeier equation of ZnS materials [19] [20] [21] [22] 
This work
Table 3. Transmittance and Refractive Indices of Common Infrared Materials
View tableView in ArticleTable 3. Transmittance and Refractive Indices of Common Infrared Materials
Refractive index at 530 nm Transmittance IR cut-off edge (µm) ZnS (this work) 2.3677 75% at 0.4–12 µm 14 Silicon[ 26 ]3.422 55% at 1.5–6.5 µm 10 Germanium[ 27 ]4.003 50% at 2–10 µm 12 Sapphire[ 28 ]1.768 88% at 0.16–4 µm 5 Magnesium fluoride[ 29 ]1.413 91% at 3–7.5 µm 10 Calcium fluoride[ 30 ]1.434 87% at 3–5 µm 10
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Xiaobo Zhao, Kui Wu, Dazhi Lu, Cong Zhang, Haohai Yu, Huaijin Zhang, "Linear optical characterization of meter-size zinc sulfide polycrystal," Chin. Opt. Lett. 23, 011601 (2025)
Paper Information
Category: Optical Materials
Received: Jun. 12, 2024
Accepted: Jul. 29, 2024
Posted: Jul. 30, 2024
Published Online: Feb. 10, 2025
The Author Email: Kui Wu (wukui@sdu.edu.cn), Dazhi Lu (dazhi.lu@sdu.edu.cn), Cong Zhang (zhangc_1984@163.com)
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