Professor Anjin Liu from the Institute of Semiconductors, Chinese Academy of Sciences visited APM

    On May 13, 2024, Professor Anjin Liu was invited by the Ultrasensitive Magnetic Resonance Research Group to give an academic report entitled ''Vertical Cavity Surface Emitting Lasers for Data Communication and Sensing'' . The lecture was hosted by Senior Engineer Yinan Hu.

    Prof. Anjin Liu, a researcher, and professor at the University of the Chinese Academy of Sciences, is an awardee of the Chinese Academy of Sciences' "BR Program" and a Humboldt scholar in Germany. He obtained his bachelor's degree from Huazhong University of Science and Technology in 2006 and his Ph.D. from the Semiconductor Institute of the Chinese Academy of Sciences in 2011. From 2012 to 2015, he worked at the Fraunhofer Heinrich-Hertz-Institute and the group of Professor Bimberg at the Technische Universität Berlin. In 2016, he joined the Institute of Semiconductors, CAS. His research focuses on novel surface-emitting lasers/semiconductor lasers and photonic integration. He has published nearly 60 papers in journals such as Photonics Research, Applied Physics Letters, Optics Letters, and Optics Express, as well as international conferences, and has been granted 19 patents in the United States and China.

    Vertical Cavity Surface Emitting Lasers (VCSELs) offer advantages such as low power consumption, high modulation rates, circular beams, on-wafer testing, and two-dimensional array integration. They have been widely used in fields such as data communication, 3D sensing, consumer electronics, and laser radar. In the lecture, Prof. Liu introduced the structure and working principles of VCSELs, and discussed the research status and development progress of various types of VCSELs, including 850 nm high-speed VCSELs, 795 nm VCSELs, and tunable MEMS-VCSELs, as well as their applications in atomic sensing and data communication.

    Prof. Anjin Liu engaged in active discussions with the participating teachers and students, further deepening their understanding of VCSELs and their applications. After the presentation, Prof. Anjin Liu visited the Zero to Ultra-Low Field NMR laboratory and the 1.5 T, 3 T, and 9.4 T MRI laboratories.