At 15:30 on October 26, 2022, Zhao Yongsheng, a researcher from the Institute of Chemistry, Chinese Academy of Sciences, was invited by Professor Huang Hui to give a keynote lecture on "Organic micro-nano laser materials and Devices" in the University of Chinese Academy of Sciences. The lecture was held in Room 306 on the first floor. 

     Laser is one of the most important and great inventions of mankind since the 20th century. It has been widely used in many fields of military and national defense, industrial production and People's Daily life. With the progress of science and technology, laser technology is also developing, among which micro-nano laser is the research frontier of laser technology and nanoscience.

     Professor Zhao Yongsheng first introduced organic micro-nano laser in a clear way, and pointed out that the key challenges in the research and application of organic laser are: the construction of high performance organic micro-nano (electrically pumped) laser and the controllable processing of large area organic micro-nano single crystal laser array. Then, the research progress of organic micro-nano laser is described from two aspects: the controllable assembly of organic micro-nano resonator and the excited state process of organic materials -- new micro-nano laser. The team realized the arbitrary adjustment of laser output wavelength between all vibration bands in the full spectrum range for the first time. The exploration and outstanding achievements of the team on organic micro-nano electric pump laser are introduced, such as improving the efficiency of electric injection by designing new molecular systems and generating threshold-free laser by Bose-Einstein condensations of excitons, etc. The application of organic micro-nano laser in display field is also introduced. Finally, Professor Zhao Yongsheng communicated and discussed with the teachers and students on the spot, and got the warm response from the teachers and students on the spot.

     Zhao Yongsheng is a professor at the Institute of Chemistry, Chinese Academy of Sciences. In October 2009, he was selected as one Hundred Talents Program of the Institute of Chemistry, Chinese Academy of Sciences. In 2011, he was awarded the National Science Foundation for Outstanding Young Scholars. In 2017, he was selected as the Leading talents of the Ten Thousand Talents Program. Prof. Zhao Yongsheng was elected as a Fellow of the Royal Society of Chemistry in 2015, and a Fellow of the Chinese Chemical Society in 2022. He has won the Royal Society of Chemistry ChemComm Young Scientist Award, the Asia Oceanian PhotoChemistry Association Young Scientist Award, the Zhongguan Chemical Professors Association Distinguished Professor Award and other international academic awards. And more than 10 domestic academic awards including the Second Prize of National Natural Science (the Second Accomplisher), Science Exploration Award, Ho Liang Ho Li Award, China Youth Science and Technology Award, Beijing Zhongguancun Award for Outstanding Young People, Chinese Chemical Society - Tibet Innovation Award, etc.