Product Introduction
Silicon (Si) single crystals are highly hard and insoluble in water. They exhibit excellent transparency in the 1–7 µm wavelength range, as well as remarkable transmittance in the far-infrared region from 30 to 300 µm—features that are unique compared to other infrared materials. Silicon single crystals are commonly used as substrates for mid-wave infrared optical windows and optical filters operating in the 3–5 µm range. Additionally, due to their superior thermal conductivity and low density, they are also a popular choice for manufacturing laser mirrors.
Optical properties
|
Through the wavelength range |
Thermal-optic coefficient, dn/dT (1/K) |
Absorption coefficient (1/cm) |
|
1000 nm – 10,000 nm |
1.6 × 10⁻⁴ |
1.6 × 10⁻³ @3000 nm |
Variation of refractive index with wavelength: (20°C)
|
Wavelength (nm) |
Refractive index (n) |
Wavelength (nm) |
Refractive index (n) |
|
1357 |
3.4975 |
4000 |
3.4257 |
|
1367.3 |
3.4926 |
4258 |
3.4245 |
|
1395.1 |
3.4929 |
4500 |
3.4236 |
|
1529.5 |
3.47951 |
5000 |
3.4223 |
|
1660.6 |
3.4696 |
5500 |
3.4213 |
|
1709.2 |
3.4664 |
6000 |
3.4202 |
|
1813.2 |
3.4608 |
6500 |
3.4195 |
|
1970.2 |
3.4537 |
7000 |
3.4189 |
|
2152.6 |
3.4476 |
7500 |
3.4186 |
|
2325.4 |
3.443 |
8000 |
3.4184 |
|
2714.4 |
3.4358 |
8500 |
3.4182 |
|
3000 |
3.432 |
10000 |
3.4179 |
|
3303.3 |
3.4297 |
10500 |
3.4178 |
|
3500 |
3.4284 |
11040 |
3.4176 |
Silicon Allotrope Window
Silicon (Si) single crystals are highly hard and insoluble in water. They exhibit excellent transparency in the 1–7 µm wavelength range, as well as remarkable transmittance in the far-infrared region from 30 to 300 µm—features that are unique compared to other infrared materials.
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