The IR transmission range of silicon is approximately 1.1 μm to 8 μm. This is the range of wavelengths of infrared light that can pass through a silicon material without being significantly absorbed.
Silicon has a relatively high IR transmission compared to other materials commonly used in infrared optics, such as germanium and zinc selenide. However, it has a lower IR transmission compared to materials specifically designed for IR applications, like calcium fluoride or barium fluoride.
The IR transmission of silicon can be affected by several factors, including the thickness and purity of the material, as well as the temperature and wavelength of the incident infrared light. Crystalline defects and impurities in the silicon can also impact its IR transmission.
Yes, the IR transmission of silicon can be improved by using high-quality, single-crystal silicon and reducing the thickness of the material. Additional techniques such as polishing and coating can also enhance the IR transmission of silicon.
Silicon is commonly used in IR transmission for applications such as infrared windows, lenses, and filters. It is also used in the production of solar cells, as silicon has a high IR transmission in the range of the sun's infrared emissions.