Anisotropic acoustic plasmons in black phosphorus

Lee, In-Ho ; Martin-Moreno, Luis (Universidad de Zaragoza) ; Mohr, Daniel A. ; Khaliji, Kaveh ; Low, Tony ; Oh, Sang-Hyun

Resumen: Acoustic plasmon modes tightly coupled between a two-dimensional material and another conducting layer can exhibit optical confinement not possible with conventional plasmons. Here, we investigate acoustic plasmons supported in a monolayer and multilayers of black phosphorus (BP) placed shortly above a conducting plate. In the presence of a conducting plate, the acoustic plasmon dispersion for the armchair direction is found to exhibit the characteristic linear scaling in the mid- and far-infrared regime while it largely deviates from that in the long-wavelength limit and near-infrared regime. For the zigzag direction, such scaling behavior is not evident due to relatively tighter plasmon confinement. Further, we demonstrate a novel design for an acoustic plasmon resonator that exhibits higher plasmon confinement and resonance efficiency than BP ribbon resonators in the mid-infrared and longer wavelength regime. The theoretical framework and new resonator designs studied here provide a practical route toward the experimental verification of acoustic plasmons in BP and open up the possibility to develop novel plasmonic and optoelectronic devices that can leverage its strong in-plane anisotropy and thickness-dependent band gap.

Idioma: Inglés

DOI: 10.1021/acsphotonics.8b00062

Año: 2018

Publicado en: ACS photonics 5, 6 (2018), 2208-2216
ISSN: 2330-4022

Factor impacto JCR: 7.143 (2018)

Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 39 / 293 = 0.133 (2018) - Q1 - T1
Categ. JCR: OPTICS rank: 6 / 95 = 0.063 (2018) - Q1 - T1
Categ. JCR: NANOSCIENCE & NANOTECHNOLOGY rank: 19 / 94 = 0.202 (2018) - Q1 - T1
Categ. JCR: PHYSICS, CONDENSED MATTER rank: 14 / 68 = 0.206 (2018) - Q1 - T1
Categ. JCR: PHYSICS, APPLIED rank: 17 / 148 = 0.115 (2018) - Q1 - T1

Factor impacto SCIMAGO: 2.983 - Atomic and Molecular Physics, and Optics (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Electrical and Electronic Engineering (Q1) - Biotechnology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2014-53432-C5

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Física Materia Condensada (Dpto. Física Materia Condensa.)