| Full text | |
| Author(s): |
Barbosa, Tiago C.
;
Chaves, Andre J.
;
Freitas, Raul O.
;
Campos, Leonardo C.
;
Barcelos, Ingrid D.
Total Authors: 5
|
| Document type: | Journal article |
| Source: | NANOSCALE; v. 17, n. 15, p. 8-pg., 2025-02-12. |
| Abstract | |
This work investigates the plasmonic properties of a twisted bilayer graphene (TBG) and talc heterostructure. Talc, a naturally occurring phyllosilicate, promotes p-type charging of graphene, supporting high charge mobility and strong interaction between graphene plasmons and talc's phonon polaritons. This interaction results in the formation of surface plasmon-phonon polariton (SP3) modes, which are detected using infrared scattering-type scanning near-field optical microscopy (IR s-SNOM) at room temperature. Notably, without the need for electrostatic gating, our study reveals confinement of SP3 modes in a TBG-talc heterostructure and a transition from surface plasmonic waves to the emergence of moir & eacute; superlattices, characterized by reflections at domain walls. These findings provide fresh insights into the coupling mechanisms in hybrid materials and suggest promising applications in nanoscale optoelectronics. (AU) | |
| FAPESP's process: | 22/02901-4 - Nano-optics of polaritons in two-dimensional crystals and at the metal/dielectric interface in the mid-to-far infrared |
| Grantee: | Francisco Carlos Barbosa Maia |
| Support Opportunities: | Research Grants - Initial Project |
| FAPESP's process: | 19/14017-9 - From excitons waves to THz-phonons: 2Ds materials nano-optics via synchrotron infrared nanospectroscopy |
| Grantee: | Raul de Oliveira Freitas |
| Support Opportunities: | Research Grants - Young Investigators Grants |