Optical-Grade Silicon for Infrared and Photonics Applications

Optical-grade monocrystalline silicon ingots are high-purity silicon materials designed for infrared optics, optoelectronic devices, silicon photonics and advanced sensing systems. With excellent crystal uniformity, stable electrical properties and reliable optical performance in infrared wavelength ranges, monocrystalline silicon provides a critical material foundation for high-precision optical and semiconductor applications.

These ingots can be sliced and processed into wafers or optical components according to customer requirements, supporting applications in infrared sensing, laser ranging, silicon photonics, MEMS devices and high-performance semiconductor systems.

Key Advantages

• Excellent infrared optical performance for mid-wave and long-wave infrared applications.
• High crystal integrity for stable optical and electrical performance.
• Customizable resistivity, conduction type, crystal orientation and dopant selection.
• Compatibility with semiconductor wafer processing and microfabrication.
• Suitable for infrared sensors, photodetectors, MEMS structures and silicon photonics devices.

Application Areas

Infrared Optoelectronic Devices

Monocrystalline silicon is widely used in infrared optoelectronic applications due to its excellent optical properties in key infrared wavelength ranges. It is suitable for high-end infrared optical systems, infrared sensing modules and precision optical components.

Silicon Photonics

In silicon photonics, monocrystalline silicon can be used to build silicon-based waveguides, modulators and grating couplers, enabling high-speed optical interconnection in data centers and communication systems. By replacing traditional electrical signal transmission with optical signal transmission, silicon photonics helps improve bandwidth, reduce latency and enhance energy efficiency.

Silicon-Based Photodetectors

Based on its carrier mobility and semiconductor characteristics, monocrystalline silicon can support high-speed and high-sensitivity photoelectric signal conversion. It is widely used in laser ranging, optical sensing and near-infrared detection systems.

MEMS Optical and Automotive Sensors

Monocrystalline silicon also serves as an ideal substrate for MEMS devices because of its high elastic modulus, low fatigue characteristics and anisotropic crystal structure. Through microfabrication processes such as DRIE, silicon can be processed into accelerometers, pressure sensors, gyroscopes and micro-mirrors used in automotive safety systems, LiDAR and precision sensing applications.

LiDAR Micro-Mirrors

Using the mechanical elasticity of monocrystalline silicon, MEMS micro-mirrors can achieve high-frequency laser beam steering for compact automotive LiDAR and three-dimensional sensing systems.

Custom Specifications Available

Sispread can customize optical-grade monocrystalline silicon ingots according to customer requirements, including size, resistivity range, conduction type, crystal orientation and dopant selection. Special specifications are available upon request for infrared optical systems, silicon photonics platforms and advanced sensor manufacturing.