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flag Chinese scientists created ABF crystal, enabling efficient 158.9 nm vacuum UV lasers for advanced tech.

flag Chinese scientists have developed a new crystal, ammonium fluorooxoborate (ABF), enabling the first direct frequency-doubling to produce a vacuum ultraviolet laser at 158.9 nanometers. flag The breakthrough, achieved using birefringent phase-matching, overcomes past challenges in growing large, high-quality crystals. flag ABF shows strong VUV transmittance, powerful nonlinear response, and favorable growth properties, offering a significant advance over previous materials like KBBF. flag The development, published in Nature, marks a major step forward in compact, efficient all-solid-state VUV lasers, critical for precision manufacturing and scientific research. flag Researchers aim to further improve crystal stability and laser performance for future applications.

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