Acoustically-driven surface and hyperbolic plasmon-phonon polaritons in graphene/h-BN heterostructures on piezoelectric substrates
arXiv:1805.09241 · doi:10.1088/1361-6463/aab8bd
Abstract
Surface plasmon polaritons in graphene couple strongly to surface phonons in polar substrates leading to hybridized surface plasmon-phonon polaritons (SPPPs). We demonstrate that a surface acoustic wave (SAW) can be used to launch propagating SPPPs in graphene/h-BN heterostructures on a piezoelectric substrate like AlN, where the SAW-induced surface modulation acts as a dynamic diffraction grating. The efficiency of the light coupling is greatly enhanced by the introduction of the h-BN film as compared to the bare graphene/AlN system. The h-BN interlayer not only significantly changes the dispersion of the SPPPs but also enhances their lifetime. The strengthening of the SPPPs is shown to be related to both the higher carrier mobility induced in graphene and the coupling with h-BN and AlN surface phonons. In addition to surface phonons, hyperbolic phonons appear in the case of multilayer h-BN films leading to hybridized hyperbolic plasmon-phonon polaritons (HPPPs) that are also mediated by the SAW. These results pave the way for engineering SAW-based graphene/h-BN plasmonic devices and metamaterials covering the mid-IR to THz range.
Submitted manuscript; 13 pages, 6 figures
References in corpus (24)
- Boron nitride substrates for high-quality graphene electronics
- Graphene plasmonics
- Graphene plasmonics: A platform for strong light-matter interaction
- Plasmonics in graphene at infra-red frequencies
- Gate-tuning of graphene plasmons revealed by infrared nano-imaging
- Optical nano-imaging of gate-tuneable graphene plasmons
- Dielectric function, screening, and plasmons in 2D graphene
- Quantum Plasmonics
- Mid-Infrared Plasmonic Biosensing with Graphene
- Manipulating infrared photons using plasmons in transparent graphene superlattices
- How to face the loss in plasmonics and metamaterials
- Dynamical polarization of graphene at finite doping
- Mid-infrared plasmons in scaled graphene nanostructures
- Sub-diffractional, volume-confined polaritons in a natural hyperbolic material: hexagonal boron nitride
- Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial
- Limits on electron quality in suspended graphene due to flexural phonons
- All-Optical Generation of Surface Plasmons in Graphene
- Single-photon nonlinear optics with graphene plasmons
- Plasmon-phonon coupling in graphene
- Flexural mode of graphene on a substrate
- Coupling light into graphene plasmons through surface acoustic waves
- Strong coupling in the far-infrared between graphene plasmons and the surface optical phonons of silicon dioxide
- Annular interdigital transducer focuses piezoelectric surface waves to a single point
- Accessing phonon polaritons in hyperbolic crystals by ARPES