Lin, Xiao and Liu, Zifei and Stauber, Tobias and Gomez-Santos, Guillermo and Gao, Fei and Chen, Hongsheng and Zhang, Baile and Low, Tony (2020) Chiral Plasmons with Twisted Atomic Bilayers. PHYSICAL REVIEW LETTERS, 125 (7): 077401. ISSN 0031-9007, 1079-7114
Full text not available from this repository. (Request a copy)Abstract
van der Waals heterostructures of atomically thin layers with rotational misalignments, such as twisted bilayer graphene, feature interesting structural moir ' e superlattices. Because of the quantum coupling between the twisted atomic layers, light-matter interaction is inherently chiral; as such, they provide a promising platform for chiral plasmons in the extreme nanoscale. However, while the interlayer quantum coupling can be significant, its influence on chiral plasmons still remains elusive. Here we present the general solutions from full Maxwell equations of chiral plasmons in twisted atomic bilayers, with the consideration of interlayer quantum coupling. We find twisted atomic bilayers have a direct correspondence to the chiral metasurface, which simultaneously possesses chiral and magnetic surface conductivities, besides the common electric surface conductivity. In other words, the interlayer quantum coupling in twisted van der Waals heterostructures may facilitate the construction of various (e.g., bi-anisotropic) atomically-thin metasurfaces. Moreover, the chiral surface conductivity, determined by the interlayer quantum coupling, determines the existence of chiral plasmons and leads to a unique phase relationship (i.e., +/-pi/2 phase difference) between their transverse-electric (TE) and transverse-magnetic (TM) wave components. Importantly, such a unique phase relationship for chiral plasmons can be exploited to construct the missing longitudinal spin of plasmons, besides the common transverse spin of plasmons.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MAGIC-ANGLE; SPIN; INSULATOR; NANOSTRUCTURES; BANDS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group John Schliemann |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 16 Mar 2021 08:44 |
| Last Modified: | 16 Mar 2021 08:44 |
| URI: | https://pred.uni-regensburg.de/id/eprint/44034 |
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