Ra 1nm cvd diamond Ultra-Smooth Optically Clear & Quantum semiconductor CVD Diamond

Engineered specifically for quantum sensing platforms, photonic integration, research studies, next-generation solid-state qubit development and much more!

Available for Single-Crystal CVD, HPHT, boron-doped, electronic-grade, and optical-grade diamond.

Lasered diamond substrate prior to polishing, with heavy etching clearly visible across the entire face. The surface is clouded, uneven, and optically rough. This appearance is typical after a diamond has been laser cut and has yet to undergo surface polishing. Similar etching can occur from prolonged exposure to acidic chemicals or when subjected to extreme temperatures during processing or intergation.

A rough surface is not suitable for quantum or photonic applications, as the surface irregularities introduce:

- High optical scatter and light loss

- NV center instability and reduced spin coherence

- Poor bonding interface performance

- Unreliable photon emission uniformity
The etched texture disrupts both optical clarity and atomic-level smoothness, making this surface unsuitable for high-precision qubit, sensing, or photonic integration work until it undergoes controlled polishing and surface reconstruction.

After the polishing, the diamond substrate surface has been fully restored to a smooth, optically clear, and uniform finish. All etching artifacts, micro-pits, and haze have been removed, resulting in a surface that is clean at both the visual and atomic scale.

The final surface roughness measures about 1 nm, placing it firmly within quantum-grade tolerances for NV center formation, single-photon emission, device bonding, and photonic integration. This level of refinement eliminates scatter pathways, supports long spin coherence stability, and ensures reliable optical coupling.

This surface finish represents the highest polish grade we offer, completely flat, distortion-free, and suited for the most demanding diamond-based quantum and photonic applications.