Van der Waals (vdW) interfaces are emerging as a versatile platform to control and investigate electronic, magnetic and optical properties of quantum materials. I will discuss nano-optical studies of ambipolar charge transfer across an interface of vdW materials with different work functions. I will also discuss space-time metrology of tera-Hertz plasmon polaritons in graphene. This novel experimental approach allowed us to directly probe electronic interactions of the Dirac quasiparticles in graphene.
Recent references:
- Brian S. Y. Kim, Aaron J.Sternbach, Min Sup Choi, Zhiyuan Sun, Francesco L. Ruta, Yinming Shao, Alexander S. McLeod, Lin Xiong, Yinan Dong, Anjaly Rajendran, Song Liu, Ankur Nipane, Sang Hoon Chae, Amirali Zangiabadi, Xiaodong Xu, Andrew J. Millis, P. James Schuck, Cory. R. Dean, James C. Hone, and D.N. Basov, “Ambipolar charge-transfer graphene plasmonic cavities,” Nature Materials 22, 838 (2023)
- Suheng Xu, Yutao Li, Rocco A. Vitalone, Ran Jing, Aaron. J. Sternbach, Shuai Zhang, Julian Ingham, Milan Delor, James. W. McIver, Matthew Yankowitz, Raquel Queiroz, Andrew J. Millis, Michael M. Fogler, Cory R. Dean, James Hone, Mengkun Liu, D.N. Basov “Electronic interactions in Dirac fluids visualized by nano-terahertz spacetime mapping” (arXiv:2312.05444)
- A. J. Sternbach, S. L. Moore, A. Rikhter, S. Zhang, R. Jing, Y. Shao, B. S. Y. Kim, S. Xu, S. Liu, J. H. Edgar, A. Rubio, C. Dean, J. Hone, M. M. Fogler, D. N. Basov “Negative refraction in hyperbolic hetero-bicrystals” Science 379, 555 (2023).
