The world's thinnest known optical crystal is here! if the boron nitride molecule, bn, were to form, what would its structure look like?

On the quartz plate, the edge rhombic boron nitride crystal with a thickness of only 1 to 3 microns is as thin as a cicada's wing. Still, its energy performance is 100 to 10,000 times higher than that of typical optical crystals. This is the thinnest well-known optical crystal worldwide developed by Chinese scientists. At the opening ceremony of the 2024 Zhongguancun Online forum Annual Fulfilling held on April 25, this crystal was released as a major success.

Academician Wang Enge of the Quantum Products Science Facility of the College of Physics of Peking University, Teacher Liu Kaihui of the Institute of Condensed Issue Physics and Products Physics, and Hong Hao, a specifically selected associate researcher, and other researchers have produced a new crystal design approach: by turning each piece of rhombic boron nitride material at a specific angle like turning a Rubik's Cube, the piled optical crystal can decrease the power intake of laser going through and effectively create the needed laser.

The crystal design theory originated by Chinese scientists is incorporated with the prep work method to successfully "slim down" the optical crystal to 1 to 3 microns. The thickness of traditional optical crystals is in the millimeter to centimeter degree.

The r & d group summarized this method as the user interface angle concept of two-dimensional materials. "The application of this concept is expected to lower the size of lasers to the micron level. Some materials that were impossible to make optical crystals in the past are also anticipated to come back to life by revolving the angle of material stacking," Liu Kaihui told press reporters.

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