Rutile (Titanium dioxide) single crystal has a very high refractive index and birefringence.
Birefringence: Rays passing through a rutile prism are separated into ordinary and extraordinary rays.
The polarization state of the extraordinary ray is perpendicular to that of ordinary one.
Please use our rutile for prism and birefringent polarizer with a high refractive index.
Rutile has excellent resistance to heat and corrosion.
We provide high quality crystals grown by our original method.
Please do not hesitate to contact us for special specifications such as shape, size, and coating.
| Material name | Rutile (Titanium dioxide, TiO2) |
|---|---|
| Crystal growth method | Verneuil method |
| Crystal system | Tetragonal |
| Crystal structure | Rutile |
| Color | Pale yellow |
| Purity | 99.98% |
| Density | 4.26g/cm3 |
| Rutile | YVO4 | LiNbO3 | ||
|---|---|---|---|---|
| Birefringence @1550 nm | 0.250 | 0.200 | 0.079 | |
| Refractive index @1550 nm | no | 2.444 | 1.938 | 2.219 |
| ne | 2.694 | 2.138 | 2.140 | |
| Thermal expansion coefficient (x10-6/K) | c-axis | 10.1 | 11.37 | 16.7 |
| a-axis | 7.81 | 4.43 | 7.0 | |
| Mohs hardness | 6.5 | 5 | 5 | |
Figure 1: Transmittance of rutile in the visible and near-infrared regions. 0.5 mm thick, (001) direction.
Figure 2: Refractive index of rutile in ordinary and extraordinary rays.
Figure 3: Comparison of rutile reflectance (with and without Anti-Reflective coating).
Figure 4: Reflectance of rutile with an Anti-Reflective coating (enlarged view of Figure 3).
