The research group of Professor Mutsuko Hatano of Tokyo Institute of Technology and others succeeded for the first time in the world in forming a luminous body made of germanium and minute holes in diamond.It can be expected to be applied to markers for imaging living cells, cryptographic communication, high-sensitivity sensors, etc.

Diamond has a structure in which carbon atoms are arranged three-dimensionally, but there are some defects in which the atoms are missing.If it contains germanium atoms as impurities, it has the property of absorbing light by acting with defects in diamond.And the absorbed light is emitted again.By absorbing light, it also emits light.A defect structure formed inside a solid that emits light is called a color center.It is thought that diamond itself can be used as a marker for visualizing cells alive because it is easy to adapt to living organisms and the life of the color center is long.For that purpose, it is necessary to form a set of many color centers and realize a state of emitting strong light.It is also said that if it is possible to form an isolated color center, it can also be used for encrypted communication.And in this research, we succeeded in forming both of them.Color centers containing germanium are superior in that they can emit stronger light and have less variation in quality than those containing nitrogen and silicon that have been known so far.

Diamond has a strong image as a jewelry, but it is also a very important substance scientifically and industrially.In this way, at cutting-edge research sites, we are playing an active role as a leader in technology that is unexpected from diamond as a jewel.People with diamond rings may look a little different.

Source:[Tokyo Institute of Technology] Germanium introduced and shining diamond developed-Expected to be applied to biomarkers and quantum cryptography communication-

Tokyo Institute of Technology

The pinnacle of science and engineering university that continues to produce science and engineering people with high aspirations and a Japanese spirit, mastering the knowledge that creates the times, refining their skills

Tokyo Institute of Technology was established as the Tokyo Institute of Technology in 1881 (Meiji 14), when modernization of industry was an urgent need.Since its establishment, it has continued to produce excellent research results with excellent science and engineering human resources, and is still at the top of Japan's science and engineering universities.Tokyo Institute of Technology requires not only a high degree of specialization but also liberal arts […]

University Journal Online Editorial Department

This is the online editorial department of the university journal.
Articles are written by editorial staff who have a high level of knowledge and interest in universities and education.