Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling
Magnetopolariton in bilayer graphene (BLG) is theoretically investigated with the consideration of the influence of asymmetry between on-site energies in the two layers of BLG. The results show that an ultrastrong light-matter coupling regime can be achieved in a high filling factor and asymmetry ha...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2014
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/104022 http://hdl.handle.net/10220/19384 |
| _version_ | 1811679639656988672 |
|---|---|
| author | Liu, Tao Wang, Qi Jie |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Liu, Tao Wang, Qi Jie |
| author_sort | Liu, Tao |
| collection | NTU |
| description | Magnetopolariton in bilayer graphene (BLG) is theoretically investigated with the consideration of the influence of asymmetry between on-site energies in the two layers of BLG. The results show that an ultrastrong light-matter coupling regime can be achieved in a high filling factor and asymmetry has a strong effect on it. Although BLG in the low-energy regime and semiconductor have a similar quadratic dispersion of quasiparticles, a remarkably different cavity quantum electrodynamics (QED) effect occurs in BLG. In particular, a quantum phase transition, as predicted by the Dicke model, occurs in BLG in spite of the Schrödinger-like term p2/2m in the system Hamiltonian, while such quantum phase transition does not exist in semiconductors. Most noticeably, the ultrastrong light-matter coupling can be easily controlled by modulating the asymmetry in BLG, which provides an excellent platform to observe interesting QED effects and can lead to tunable polariton-based devices and cavity-controlled magnetotransport in BLG. |
| first_indexed | 2024-10-01T03:12:21Z |
| format | Journal Article |
| id | ntu-10356/104022 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:12:21Z |
| publishDate | 2014 |
| record_format | dspace |
| spelling | ntu-10356/1040222023-02-28T19:23:18Z Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling Liu, Tao Wang, Qi Jie School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences DRNTU::Engineering::Electrical and electronic engineering Magnetopolariton in bilayer graphene (BLG) is theoretically investigated with the consideration of the influence of asymmetry between on-site energies in the two layers of BLG. The results show that an ultrastrong light-matter coupling regime can be achieved in a high filling factor and asymmetry has a strong effect on it. Although BLG in the low-energy regime and semiconductor have a similar quadratic dispersion of quasiparticles, a remarkably different cavity quantum electrodynamics (QED) effect occurs in BLG. In particular, a quantum phase transition, as predicted by the Dicke model, occurs in BLG in spite of the Schrödinger-like term p2/2m in the system Hamiltonian, while such quantum phase transition does not exist in semiconductors. Most noticeably, the ultrastrong light-matter coupling can be easily controlled by modulating the asymmetry in BLG, which provides an excellent platform to observe interesting QED effects and can lead to tunable polariton-based devices and cavity-controlled magnetotransport in BLG. Published version 2014-05-20T02:58:45Z 2019-12-06T21:24:47Z 2014-05-20T02:58:45Z 2019-12-06T21:24:47Z 2014 2014 Journal Article Liu, T., & Wang, Q. J. (2014). Magnetopolariton in bilayer graphene: A tunable ultrastrong light-matter coupling. Physical Review B, 89(12), 125306-. 1098-0121 https://hdl.handle.net/10356/104022 http://hdl.handle.net/10220/19384 10.1103/PhysRevB.89.125306 en Physical review B © 2014 American Physical Society. This paper was published in Physical Review B and is made available as an electronic reprint (preprint) with permission of American Physical Society. The paper can be found at the following official DOI: http://dx.doi.org/10.1103/PhysRevB.89.125306. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
| spellingShingle | DRNTU::Engineering::Electrical and electronic engineering Liu, Tao Wang, Qi Jie Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling |
| title | Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling |
| title_full | Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling |
| title_fullStr | Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling |
| title_full_unstemmed | Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling |
| title_short | Magnetopolariton in bilayer graphene : a tunable ultrastrong light-matter coupling |
| title_sort | magnetopolariton in bilayer graphene a tunable ultrastrong light matter coupling |
| topic | DRNTU::Engineering::Electrical and electronic engineering |
| url | https://hdl.handle.net/10356/104022 http://hdl.handle.net/10220/19384 |
| work_keys_str_mv | AT liutao magnetopolaritoninbilayergrapheneatunableultrastronglightmattercoupling AT wangqijie magnetopolaritoninbilayergrapheneatunableultrastronglightmattercoupling |