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Topological-cavity Surface-emitting Laser
Speaker Prof. Ling Lu, Chinese Academy of Sciences, Beijing
Date 2 March 2023 (Thursday)
Time 10:00 - 11:30
Venue Mixed-Mode
• To join the talk in person: Room 4504, Academic Building, HKUST (Lifts 25-26)
• To join the talk online: Zoom Link: https://hkust.zoom.us/j/99895849945?pwd=dTJEZTlaTUJmR2dZQ2RyditQeVY4dz09
Meeting ID: 998 9584 9945, Passcode: 210453

Contrary to the perception that the Nobel-winning topological physics has not found useful applications, we show that the textbook design of daily-life semiconductor lasers are equivalent to standard topological models in 1D. By upgrading to the 2D vortex zero mode, we invent the topological-cavity surface-emitting lasers (TCSEL) whose performance far exceeds that of the commercial counterparts. Finally, we demonstrate the monopole cavity in 3D with the optimal single-mode behavior, completing the kink-vortex-monopole trilogy of topological defect modes.


Nature Nanotechnology 15, 1012 (2020)
Nature Photonics 16, 279 (2022) TCSEL.com
arXiv: 2210.09056


Ling Lu is a group leader in the Institute of Physics, Chinese Academy of Sciences, Beijing China. He obtained his bachelor in Physics from Fudan University, and a Ph.D. in Electrical Engineering from University of Southern California where he worked on photonic crystal nanocavity lasers. He was a postdoc at Massachusetts Institute of Technology, where he coined “topological photonics” and discovered “Weyl points”. He was awarded the Chen Ning Yang Award by the Asian Pacific Societies, the Highly Cited Researchers by Clarivate Web of Science, and the Distinguished Young Scientists program by Natural Science Foundation of China.