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Using oxygen to cut diamonds The technology discovered by the research team is groundbreaking, using this technology to etch diamonds into millimeter-scale single crystal diamond discs. The surface finish is very high and the distance between the groove and the groove is only a few microns. The research team used diamonds made by chemical vapor deposition. Diamond etching is divided into the following steps. First, a hard film is deposited on the surface of the diamond, and then oxygen ions are formed on the surface of the diamond by the action of the electric field through the oxygen plasma. Where there is no hard film coverage, oxygen ions cause carbon atoms to detach from the diamond surface. The shape of the diamond etch can be changed by adjusting the strength of the electric field. We engraved a triangular groove with a groove spacing of a few microns to make a diffraction grating. Adjust the processing parameters to selectively display a clear set of crystal faces. With this type of processing, we can machine a V-groove with a smooth atomic level, which is impossible with laser cutting. (Compile: China Superhard Materials Network)
The Swiss Federal Institute of Technology in Lausanne has developed a new technology to make pure diamond into an optical diffraction grating. These new originals can be used to change the wavelength of high performance lasers and can also be applied to advanced spectrometers. Researchers at the Federal Institute of Technology in Lausanne, Switzerland, have developed a new method of cutting diamonds into specific shapes and polishing them with a microscope. This technology was introduced at the International Diamond and Carbon Materials Conference on September 5, 2017. This new technology has unique implications for spectroscopy and high-energy laser optics. Like prisms, the diffraction grating consists of parallel fine grooves that disperse light into spectral components. The diffraction grating is made of glass and silicon material, which changes the color of the laser. A team led by Niels Quaker, a professor of engineering at the Federal Institute of Technology in Lausanne, Switzerland, found that single crystal diamonds can also be made into diffraction gratings. This discovery opens up new possibilities in the field. Diamond has very good thermal conductivity and is 5 to 10 times more than other materials. Diamond is extremely hard and works well under UV rays, infrared and other visible light beams. Diamond is chemically inert and can't be corroded even by the most corrosive chemicals. This also means that diamonds are difficult to manufacture. This new cutting method is very effective.