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Toward Monoatomic-Layer Field Confinement Limit via Acoustic Graphene Plasmons
- Source :
- Phys. Rev. Applied 19, 064039 (2023)
- Publication Year :
- 2020
-
Abstract
- Vertical plasmonic coupling in double-layer graphene leads to two hybridized plasmonic modes: optical and acoustic plasmons with symmetric and anti-symmetric charge distributions across the interlayer gap, respectively. However, in most experiments based on far-field excitation, only the optical plasmons are dominantly excited in the double-layer graphene systems. Here, we propose strategies to selectively and efficiently excite acoustic plasmons with a single or multiple nano-emitters. The analytical model developed here elucidates the role of the position and arrangement of the emitters on the symmetry of the resulting graphene plasmons. We present an optimal device structure to enable experimental observation of acoustic plasmons in double-layer graphene toward the ultimate level of plasmonic confinement defined by a monoatomic spacer, which is inaccesible with a graphene-on-a-mirror architecture.
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Physics - Optics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 19, 064039 (2023)
- Publication Type :
- Report
- Accession number :
- edsarx.2012.13519
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.19.064039