Infrared and Laser Engineering, Volume. 54, Issue 5, 20240492(2025)
Photothermal simulation of laser protective/mid-infrared antireflective multilayer on ZnS window
Figures & Tables(14)
Fig. 2. Multilayer laser thermal response model. (a) Geometrical model; (b) Model mesh
Fig. 4. Film/substrate temperature of different multilayers under laser irradiation
Fig. 5. Optical window temperature over time under different structures
Fig. 6. Effects of top three layer thickness error
Fig. 7. (a) Effects of reflective index error
Fig. 8. Relationship between difference of reflective index and film/substrate temperature under different condition
Fig. 9. Relationship between difference of reflective index and film absorptance under different condition
Fig. 10. (a) Effects of extinction coefficient
Table 1. Laser parameter in thermal simulation
View tableView in ArticleTable 1. Laser parameter in thermal simulation
Parameters Value Working condition Continous wave Polarization Linear polarization Wavelength/μm 1.06 Incident angle/(°) 0 Power density/W∙cm−2 5×109 Laser spot diameter/μm 8
Table 2. Material parameters of model [16−17]
View tableView in ArticleTable 2. Material parameters of model [16−17]
Materials HfO2 SiO2 ZnS YbF3 ZnS(Substrate) Y2O3 Reflective index 1.92 1.46 2.28 1.45 2.28 1.74 Extinction coefficient 6.9×10−5 1.2×10−5 1.6×10−5 9.3×10−6 1×10−5 1×10−5 Density/kg∙m−3 9680 2680 4080 8200 4080 5200 Heat capacity/J∙(kg∙K)−1 310 754 468 854 468 249 Thermal conductivity/W∙m∙K 1.3 27 16.7 27 16.7 27
Table 3. Multilayer structure on ZnS substrate
View tableView in ArticleTable 3. Multilayer structure on ZnS substrate
Substrate HfO2/SiO2 ZnS/YbF3 ZnS Sub|4.01H1.07L1.36H(LH)90.79L1.64H4.35L|Air Sub|0.48 H0.65 L2.01 H(LH)90.23 L0.51 H4.05 L|Air
Table 4. Three laser thermal response model structures
View tableView in ArticleTable 4. Three laser thermal response model structures
Structure Component Stack formula Structure 1 ZnS substrate - Structure 2 Y2O3 single layer on ZnS substrate Sub|575 nmY2O3|Air Structure 3 HfO2/SiO2 multilayers on ZnS substrate Sub|0.48H0.65L2.01H(LH)90.23L0.51H4.05L|Air
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Yuanrui CAO, Lishuan WANG, Huasong LIU, Shiqi YANG, Peng SUN, Xinshang NIU. Photothermal simulation of laser protective/mid-infrared antireflective multilayer on ZnS window[J]. Infrared and Laser Engineering, 2025, 54(5): 20240492
Paper Information
Category: 光电材料与器件
Received: Nov. 29, 2024
Accepted: --
Published Online: May. 26, 2025
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