Complaint
| Si Crystal Silicon is used as an optical window primarily in the 3 to 5 micron band and as a substrate for production of optical filters. It is frequently used for laser mirrors because of its high thermal conductivity and low density. Silicon is also useful as a transmitter in the 20 micron range. Large blocks wi th polished faces are also employed as targets in neutron physics experiments .Silicon is grown by Czochralski pulling techniques (CZ) and contains some oxygen which causes an absorption band at 9 microns. To avoid this, material can be prepared by a Float-Zone (FZ) process. Optical silicon is generally lightly doped ( 5 to 40 ohm cm) for best transmission above 10 microns. Silicon has a further pass band 30 to 100 microns which is effective only in very high resistivity uncompensated material. | |
Silicon (Si) | |
BASE PROPERTIES |
PARAMETER | VALUE |
OPTICAL | |
Transmission Range | 1.2 to 15 microns |
Refractive Index | 3.4223 at 5 microns |
Reflection Loss | 46.2% at 5 microns (2 surfaces) |
Restrahlen Peak | 1 x 10-3 cm-1 at 3 microns |
dN/dT | 160 x 10-6e/C |
dN/d = 0 | 10.4m |
PHYSICAL | |
Density | 2.33 g/cm3 |
Melting Point | 1420C |
Thermal Conductivity | 163.3 W/(m*K) at 273K |
Thermal Expansion | 4.15 x 10-6/C |
Hardness | Knoop 1150 |
Specific Heat Capacity | 703J/(kg K) |
Dielectric Constant | 13 at 10GHz |
Young's Modulus (E) | 131 GPa |
Shear Modulus (G) | 79.9 GPa |
Bulk Modulus (K) | 102 GPa |
Elastic Coefficients | C11 = 167 C12 = 65 C44 = 80 |
Poisson Ratio | 0.266 |
CHEMICAL | |
Solubility | Insoluble in water |
Molecular Weight | 28.09 |
Class/Structure | Cubic diamond, Fd3m |
| REFRACTIVE INDEX | |||||
Wavelength, m | 1.40 | 1.50 | 1.66 | 1.82 | 2.05 |
Refractive Index | 3.94 | 3.48 | 3.47 | 3.46 | 3.46 |
Wavelength, m | 2.50 | 3.50-5.00 | 6.00-25.00 | ||
Refractive Index | 3.44 | 3.44 | 3.42 |
Other Items
Factory information
Yutai Optics, we specialize in the design and volume manufacturing of high performance optical components such as lens,prisms, windows,filters,mirrors and more for use in optical instruments and laser systems, as well as for telecommunications,medical, environment monitoring industry,material is widely ranged from optical glass to IR and UV glass.
As a Fast-growing supplier in Optics, Yutai Optics offers excellent service and good quality items,our products have been appreciated by many European and American customers,of course we build a long-term cooperation.YuTai Optics has quickly established itself as a leader in optical components from its advanced technology and quality control.
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