scientists have unveiled the world’s thinnest optical crystal, a key component for lasers. This revolutionary material is a rhombohedral boron nitride crystal, just micrometers thick, and boasts dramatically improved efficiency. Lasers play a crucial role in various fields like micro-nano processing, healthcare, and quantum technologies. Their miniaturization is a key development goal.
The ultra-thin crystal achieves a remarkable 8% efficiency in optical frequency doubling conversion across a wide range of spectrums, making it 100 to 10,000 times more efficient than conventional crystals at the same size. This innovation goes beyond efficiency gains. Corner phase matching grants boron nitride crystals the ability to control the polarization of light, paving the way for a new generation of lasers with extreme wavelengths, sizes, and stability.
Professor Liu Kaihui, part of the research team, predicts this technology could miniaturize lasers to the micron level and potentially revive previously unsuitable materials for creating optical crystals. This discovery holds immense potential for the future of laser technology.
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