Seemann, Lukas and Knothe, Angelika and Hentschel, Martina (2024) Steering internal and outgoing electron dynamics in bilayer graphene cavities by cavity design. NEW JOURNAL OF PHYSICS, 26 (10): 103045. ISSN 1367-2630
Full text not available from this repository. (Request a copy)Abstract
Ballistic, gate-defined devices in two-dimensional materials offer a platform for electron optics phenomena influenced by the material's properties and gate control. We study the ray trajectory dynamics of all-electronic, gate-defined cavities in bilayer graphene to establish how distinct regimes of the internal and outgoing charge carrier dynamics can be tuned and optimized by the cavity shape, symmetry, and parameter choice, e.g. the band gap and the cavity orientation. In particular, we compare the dynamics of two cavity shapes, o & napos;igiri, and Lima & ccedil;on cavities, which fall into different symmetry classes. We demonstrate that for stabilising regular, internal cavity modes, such as periodic and whispering gallery orbits, it is beneficial to match the cavity shape to the bilayer graphene Fermi line contour. Conversely, a cavity of a different symmetry than the material dispersion allows one to determine preferred emission directionalities in the emitted far-field.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | bilayer graphene; ray-wave correspondence; anisotropic dispersion; asymmetric micro cavities; emission characteristics; controlling electron dynamics |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Dec 2025 09:21 |
| Last Modified: | 09 Dec 2025 09:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/64386 |
Actions (login required)
 |
View Item |
