Ultrafast Microscopy of Plasmonic Spin Topology

Optics describes the physical structuring and interaction of electromagnetic fields. It is, thus, the natural domain for designing and investigating topological phenomena. My current PhD research focuses on ultrafast microscopy of plasmonic spin topology on nanometer spatial and femtosecond temporal scale. Topological quasi-particles such as skyrmions and merons, exhibit non-trivial and robust spin topology; hence, they demonstrate potential applications in spin-based electronics, information storage and quantum computing. By combining ultrafast microscopy, nanofabrication, electromagnetic simulations and mathematical analysis, my research studies provide significant contributions to understand the plasmonic counterpart to these spin topologies, which is currently a rapidly evolving field.

For more information, please see our group page:
http://www.ultrafast.phyast.pitt.edu/index.html

Publications:

1. Yanan Dai, Zhikang Zhou, Atreyie Ghosh, Roger S. K. Mong, Atsushi Kubo, Chen-Bing Huang, Hrvoje Petek, “Plasmonic topological quasiparticle on the nanometre and femtosecond scales”, Nature, 588, 616-619 (2020), https://doi.org/10.1038/s41586-020-3030-1.
2. Atreyie Ghosh, Sena Yang, Yanan Dai, Zhikang Zhou, Chen-Bing Huang, Hrvoje Petek, “A topological lattice of plasmonic meron”, Featured Article: Applied Physics Reviews 8, 041413 (2021), https://doi.org/10.1063/5.0062133.
3. Atreyie Ghosh, Sena Yang, Yanan Dai, Hrvoje Petek, “The spin texture topology of polygonal plasmon fields”, ACS Photonics, 10, 13-23 (2023), https://doi.org/10.1021/acsphotonics.2c01491.
4. Yanan Dai, Atreyie Ghosh, Sena Yang, Zhikang Zhou, Chen-Bing Huang, Hrvoje Petek, “Poincaré Engineering of Surface Plasmon Polaritons”, Nature Reviews Physics 4, 562-564 (2022), https://doi.org/10.1038/s42254-022-00492-w.
5. Yanan Dai, Zhikang Zhou, Atreyie Ghosh, Karan Kapoor, Maciej Dąbrowski, Atsushi Kubo, Chen-Bing Huang, Hrvoje Petek, “Ultrafast microscopy of a Plasmonic Spin Skyrmion”, Featured Article: Applied Physics Reviews 9, 011420 (2022), https://doi.org/10.1063/5.0084482.
6. Yanan Dai, Zhikang Zhou, Atreyie Ghosh, Sena Yang, Chen-Bing Huang, Hrvoje Petek, “Ultrafast nanofemto photoemission electron microscopy of vectorial plasmonic fields”, MRS Bulletin, 46, 738-746 (2021), https://doi.org/10.1557/s43577-021-00152-x.

Book Chapters:

1. Hrvoje Petek, Yanan Dai, Atreyie Ghosh, Andi Li, Zhikang Zhou, Marcel Reutzel, Sena Yang, Chen-Bin Huang, “Light Matter”, Chapter 8, pp 153-171, Emerging Trends in Chemical Applications of Laser, ACS Symposium Series, Vol. 1398 (2021).

Last Updated: March 2023