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The world's thinnest known optical crystal is here! boron nitride

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On the quartz plate, the corner rhombic boron nitride crystal with a density of only 1 to 3 microns is as slim as a cicada's wing. Still, its energy efficiency is 100 to 10,000 times greater than that of traditional optical crystals. This is the thinnest known optical crystal in the world invented by Chinese researchers. At the opening event of the 2024 Zhongguancun Discussion forum Yearly Fulfilling hung on April 25, this crystal was launched as a major achievement.

Academician Wang Enge of the Quantum Products Science Center of the College of Physics of Peking College, Professor Liu Kaihui of the Institute of Condensed Matter Physics and Materials Physics, and Hong Hao, a particularly selected associate scientist, and other scientists have produced a brand-new crystal design method: by turning each piece of rhombic boron nitride product at a specific angle like twisting a Rubik's Cube, the stacked optical crystal can minimize the power usage of laser going through and efficiently create the required laser.

(Boron Nitride BN Powder)

The crystal style concept pioneered by Chinese scientists is integrated with the preparation method to successfully "lose weight" the optical crystal to 1 to 3 microns. The density of standard optical crystals remains in the millimeter to centimeter level.

The research and development group summarized this approach as the interface angle concept of two-dimensional products. "The application of this theory is expected to reduce the size of lasers to the micron level. Some products that were difficult to make optical crystals in the past are additionally expected to come back to life by turning the angle of material stacking," Liu Kaihui informed press reporters.

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