Acta Optica Sinica, Volume. 43, Issue 9, 0916003(2023)
Determination of High-Temperature Refractive Index of Sapphire by Laser Displacement Measurement and Theoretical Research
Fig. 1. Parallel plate imaging principle
Fig. 2. Schematic diagram of optical path
Fig. 3. Test principle of laser displacement method. (a) Path of laser displacement; (b) position relation among laser spot, sapphire and CMOS camera
Fig. 4. Lattice parameters and model. (a) Schematic diagram of cell parameters of α-Al2O3 varying with temperature; (b) schematic diagram of crystal model of α-Al2O3 for theoretical calculation
Fig. 5.
Fig. 6. Relationship between measured refractive index and temperature. (a) Relationship between measured no of sapphire and temperature; (b) relationship between measured ne of sapphire and temperature
Fig. 7. Complex refractive index of α-Al2O3 varying with temperature. (a) [100] crystal orientation; (b) [001] crystal orientation
Fig. 8. Relationship between simulated refractive index of sapphire and temperature
Fig. 9. Point K path graph in Brillouin zone
Fig. 10. Simulation results of band structure of α-Al2O3. (a) Band structure of α-Al2O3 crystal; (b) relationship between band gap and temperature
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Zheng Cheng, Min Zhu, Yunan Liu, Zeya Huang, Wei Wang, Zhiqiang Shao. Determination of High-Temperature Refractive Index of Sapphire by Laser Displacement Measurement and Theoretical Research[J]. Acta Optica Sinica, 2023, 43(9): 0916003
Category: Materials
Received: Nov. 1, 2022
Accepted: Dec. 16, 2022
Published Online: May. 9, 2023
The Author Email: Huang Zeya (huangzeya@nuaa.edu.cn)