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Past Events
Topological-cavity surface-emitting laser (Joint Seminar of the Department of Mechanical Engineering and the Department of Physics)
| Speaker: | Prof. Ling LU |
| Affiliation: | Institute of Physics, Chinese Academy of Sciences, Beijing, China |
| Date: | March 6, 2023 (Monday) |
| Time: | 11:00 a.m. |
| Venue: | [In Person] CPD-LG.63, Central Podium Levels - Lower Ground, Centennial Campus, The University of Hong Kong [Zoom] https://bit.ly/3mgTtEN Meeting ID: 912 8680 5770 Password: 099467 |
Abstract
Contrary to the perception that Nobel-winning topological physics has not found useful applications, we show that the textbook design of daily-life semiconductor lasers is equivalent to standard topological models in 1D. By upgrading to the 2D vortex zero modes, we invent topological-cavity surface-emitting lasers (TCSEL) whose performance far exceeds that of their commercial counterparts. Finally, we demonstrate the monopole cavity in 3D with the optimal single-mode behaviours, completing the kink-vortex-monopole trilogy of topological defect modes.
References:
Nature Nanotechnology 15, 1012 (2020)
Nature Photonics 16, 279 (2022) TCSEL.com
arXiv: 2210.09056
Anyone interested is welcome to attend.