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| The admission letter inlaid with diamond. (PHOTO: Harbin Institute of Technology) |
Recently, an admission letter inlaid with diamonds has gone viral on Chinese social media Weibo, with 260 million views.
Decorated with self-developed diamonds and sapphires, the admission letter to freshman of 2022 was made by a research team of the center for composite materials and structure, Harbin Institute of Technology (HIT).
Single crystal diamonds are widely used in quantum communication, extreme optics, AI, ultra-precision machining and other fields. With ultra-high thermal conductivity, it is electronic material that can tolerate high power and high frequency applications.
Different from gem-quality diamonds and natural diamonds, the single crystal diamonds inlays in the admission letter are industrial diamonds, according to Prof. Zhu Jiaqi, leader of the HIT research team.
In the process of developing heat dissipation for high-power devices and quantum chips, the team turned "waste" into treasure by using high-energy pulsed ultraviolet lasers to engrave single crystals diamonds that could not meet extreme requirements.
In collaboration with its partners, the HIT team successfully achieved elastic straining of diamond at an unprecedented level, a breakthrough that heralds a new diamond age in the utilization of the gemstone in microelectronics, photonics, and quantum information technologies.