Advantages of diamond wafers in the field of infrared optics

Diamond wafers, thanks to their unique physical and chemical properties, have become a key material for breakthroughs in modern infrared optical technology. They boast irreplaceable advantages in the field of infrared optics, with main applications in the following areas:

· Advantages in core optical performance

·Ultra-broad spectral transmittance

Its spectral coverage ranges from 225nm to the far-infrared band (>100µm), enabling continuous and efficient light transmission from the ultraviolet to the far-infrared; the transmittance in the far-infrared band (10–100µm) is as high as over 90%, which is significantly better than that of traditional infrared materials (such as zinc sulfide).

·Extremely low optical loss

Its absorption coefficient is as low as 10⁻²–10⁻³ cm⁻¹, resulting in minimal light penetration loss and ensuring high-efficiency transmission of high-energy lasers. With a high refractive index of 2.4, interface reflection loss can be suppressed through coating technology.

To sum up, diamond wafers, relying on the synergistic advantages of "light transmission-thermal conductivity-damage resistance", are reshaping the performance boundaries of infrared optical systems. As CVD preparation technology matures, they will show greater potential in emerging fields such as terahertz communication and quantum sensing in the future.

CSMH uses the MPCVD method to prepare large-sized and high-quality diamonds,and currently has mature products such as diamond heat sinks, diamond wafers, diamond windows,diamond hetero junction integrated composite substrates,etc.Among them,the thermal conductivity of diamond heat sinks is 1000-2200w/（m.k）, and the surface roughness of diamond wafer a<1nm.It has been applied in aerospace, high-power semiconductor lasers, optical communication, chip heat dissipation, nuclear fusion and other fields.