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Table 1 Refractive indices and extinction coefficients of the materials used in this study at a dominant wavelength of 460 nm

From: Highly Reflective Thin-Film Optimization for Full-Angle Micro-LEDs

Material Refractive index at 460 nm
Al2O3 1.67026
TiO2 2.40695
SiO2 1.46488
Al 0.54095