题目：ELEOCTROLUMINESCENCE of DIAMOND NV-CENTERS at TEMPERATURES 450–680°С

报告人：Prof. Sergei G. Buga, Moscow Institute of Physics and Technology

报告时间：2025年4月24日（周四）下午3:00

报告地点：超硬实验综合楼5楼A514会议室

报告摘要：Diamond light emitting diodes (LED) on NV-centers are considered as the best source of single photons for quantum communication systems. Since 2012 a phosphorus-doped diamond was used before as an n-type layer in such pin diodes. 5*10⁵ photons/s radiation rate was obtained at room temperature, while it should be 10⁶-10⁸ for real appliations in quantum communication systems instead of optical fiber laser operating in diode mode and possessing relatively high noise level, which prevents 100% protection of the communication channel. By optimization of the design of a diode the superinjection effect in dimond homostructure can be realised, thus the rate can be increased to more than 10⁷-10⁸ photons/s, according to theoretical simulations. The role of heating of a diode may also have positive effect due to exponential increase in the density of free electrons in n-layer. In this work nitrogen-doped diamond was used for the first time instead of phosphorus-doped as n-type layer in the diamond LED and heating up to 680^oC was explored.

个人简介：Sergei G. Buga, Head Research Scientist at Technological Institute for Superhard & Novel Carbon Materials (Moscow); Professor at Moscow Institute of Physics and Technology (Moscow) Chair of Physics and Chemistry of Nanostructures. Education: Lomonosov Moscow State University, Physical Department, graduated in 1981. PhD degree in 1984. Dr.of Sc. degree in 2012. Fields of research activity: materials sciences, solid state physics, high-pressure research, superhard materials, phase transitions, elastic properties, electronic properties, nanocarbon materials, synthetic diamonds, semiconductors, superconductors, topological insulators. Leader of ~10 scientific projects granted by the Ministry of Science & Education of the Russan Federation, and Russia-China RFBR-NSFC project. Recipient of 1991 Young Scientist Award of the Europen High-Pressure Research Group (EHPRG). Member of the EHPRG Commette 2016-2019.