Anisotropic Acoustic Plasmons in Black Phosphorus
| Autor: | Daniel A. Mohr, Kaveh Khaliji, In Ho Lee, Luis Martín-Moreno, Tony Low, Sang Hyun Oh |
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| Přispěvatelé: | National Science Foundation (US), Ministerio de Economía y Competitividad (España), National Institutes of Health (US), University of Minnesota |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
FOS: Physical sciences Physics::Optics 02 engineering and technology 01 natural sciences Resonator Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Dispersion (optics) Physics::Atomic and Molecular Clusters Electrical and Electronic Engineering 010306 general physics Anisotropy Plasmon Condensed Matter - Mesoscale and Nanoscale Physics Condensed matter physics Acoustic plasmon Black phosphorus Resonance Gap plasmon Surface plasmon polaritons 021001 nanoscience & nanotechnology Surface plasmon polariton Atomic and Molecular Physics and Optics Two-dimensional material Electronic Optical and Magnetic Materials Wavelength Zigzag 0210 nano-technology Physics - Optics Optics (physics.optics) Biotechnology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| ISSN: | 2330-4022 |
| DOI: | 10.1021/acsphotonics.8b00062 |
| Popis: | 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. This research was supported primarily by the U.S. National Science Foundation (MRSEC Seed Grant to I.-H.L., T.L., K.K., S.-H.O.; ECCS 1610333 to S.-H.O.). L.M.-M. acknowledges financial support by the Spanish MINECO under Contract No. MAT2014-53432-C5. D.A.M. acknowledges the NIH Biotechnology Training Grant (NIH T32 GM008347). L.M.-M., T.L., and S.-H.O. also thank support from the Institute for Mathematics and its Applications (IMA) at the University of Minnesota. |
| Databáze: | OpenAIRE |
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