|
Diamond is transparent from the UV (225 nm) to the far infrared.
Only minor absorption bands exist resulting from two phonon absorption
between 2.5 and 6.5 µm. This makes diamond an ideal material
for multispectral optical applications.
Furthermore, its large bandgap (5.45 eV) prevents thermally generated
charge carriers at elevated temperatures. Therefore diamond remains
transparent even at very high temperatures and radiation intensities.
Beside these properties also its extreme thermal conductivity,
hardness, wear and chemical resistance are of importance for
various optical applications.
| | |
| Refraction index @500nm |
2.41 |
| Bandgap |
5.45 eV |
| Absorption coefficient @10.6µm |
<0.10 cm-1 |
| Loss tangent (tanδ @140 GHz) |
<2.0×10-5 |
|
