In advanced optical systems—such as EUV lithography high-power laser windows, wafer laser annealing systems, and microwave windows in gyrotrons for controlled nuclear fusion—conventional optical materials are limited by narrow spectral transmission, poor environmental stability, and low damage thresholds.
SEMIXICON DIASEMI has developed high-performance diamond optical materials featuring ultra-broad spectral transmission and exceptional multi-physics stability, providing comprehensive technical solution for next-generation optical windows.
Ultra-Broad Spectral Transmission & Superior Optical Properties
Diamond’s unique crystal structure enables transmission across an exceptionally wide spectral range—from ultraviolet to microwave—while maintaining outstanding physical and chemical robustness:
High Transmittance
Single-crystal IR transmittance: >71%
Polycrystalline IR transmittance: >70%
Stable transmission across UV, IR, and microwave regimes
Extreme Stability
Chemically inert: resistant to acids and alkalis
Ultra-high hardness (Mohs 10): superior wear and impact resistance
High thermal shock and radiation resistance
No performance degradation over long-term operation
Compared with conventional materials such as optical glass, sapphire, and ZnS, diamond offers significantly enhanced durability and broader operational bandwidth.
Precision Manufacturing: Large Size + High Accuracy
Enabled by in house developed advanced MPCVD processes, both single-crystal and polycrystalline diamond optical components are produced in bulk now with high consistency:
Large-Area Capability
Single crystal: up to 20 × 20 mm
Polycrystalline: up to Ø100 mm
Ultra-Precision Finishing
Surface roughness: < 3 nm
Parallelism: < 5 μm
Figure accuracy: < 1 μm
Custom Engineering
Fully customizable in size, shape, and thickness for applications including Raman laser optics, gyrotron microwave windows, and high-power CO₂ laser systems.
Application Coverage: Enabling Next-Generation Technologies
Diamond optical windows are critical enablers across multiple frontier domains:
High-Power Laser Systems
High thermal conductivity minimizes thermal lensing and ensures beam quality and long-term stability
Radiation & X-ray Systems
High transmission and low absorption make diamond ideal for synchrotron, medical imaging, and NDT applications
High-Power Microwave Devices
Excellent thermal and dielectric properties support reliable transmission of megawatt-level microwave energy
Extreme Environments
