Strongly Absorbing Nanoscale Infrared Domains within Graphene Bubbles
arXiv:1912.12061 · doi:10.1021/acsami.0c19334
Abstract
Graphene has shown great potential for modulating infrared (IR) light in devices as small as 350 nm. At these length scales, nanoscale features of devices, and their interaction with light, can be expected to play a significant role in device performance. Bubbles in van der Waals heterostructures are one such feature, which have recently attracted considerable attention thanks to their ability to modify the optoelectronic properties of 2D materials through strain. Here we use scattering-type scanning near-field optical microscopy (sSNOM) to measure the nanoscale IR response from a network of variously shaped bubbles in hexagonal boron nitride (hBN)-encapsulated graphene. We show that within individual bubbles there are distinct domains with strongly enhanced IR absorption. We correlate this with strain in the graphene, found with confocal Raman microscopy and vector decomposition analysis. This reveals intricate and varied strain configurations, in which bubbles of different shape induce more bi- or uniaxial strain configurations. Ridges in the bubbles, seen by atomic force microscopy (AFM), coincide with the domain boundaries, which leads us to attribute the domains to nanoscale strain differences in the graphene. This reveals pathways towards future strain-based graphene IR devices.
References in corpus (53)
- The electronic properties of graphene
- Raman spectroscopy as a versatile tool for studying the properties of graphene
- Boron nitride substrates for high-quality graphene electronics
- Graphene plasmonics
- Graphene plasmonics: A platform for strong light-matter interaction
- Gate-tuning of graphene plasmons revealed by infrared nano-imaging
- Polaritons in layered 2D materials
- Manipulating infrared photons using plasmons in transparent graphene superlattices
- Optical Separation of Mechanical Strain from Charge Doping in Graphene
- Highly confined low-loss plasmons in graphene-boron nitride heterostructures
- Cross-sectional imaging of individual layers and buried interfaces of graphene-based heterostructures and superlattices
- Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial
- Recent progress in the assembly of nanodevices and van der Waals heterostructures by deterministic placement of 2D materials
- Hyperbolic phonon-polaritons in boron nitride for near-field optical imaging
- Raman spectroscopy of graphene and bilayer under biaxial strain: bubbles and balloons
- Electronic Properties of Graphene Encapsulated with Different Two-Dimensional Atomic Crystals
- Quality heterostructures from two dimensional crystals unstable in air by their assembly in inert atmosphere
- Graphene bubbles on a substrate : Universal shape and van der Waals pressure
- Electronic and plasmonic phenomena at graphene grain boundaries
- Electronically Tunable Perfect Absorption in Graphene
- Edge and surface plasmons in graphene nanoribbons
- Raman Spectroscopy of Electrochemically-Gated Graphene Transistors: Geometrical Capacitance, Electron-Phonon, Electron-Electron, and Electron-Defect Scattering
- Evidence of Flat Bands and Correlated States in Buckled Graphene Superlattices
- Graphene Nanobubbles as Valley Filters and Beamsplitters
- Strained bubbles in van der Waals heterostructures as local emitters of photoluminescence with adjustable wavelength
- Visualizing Strain-induced Pseudo magnetic Fields in Graphene through an hBN Magnifying Glass
- Phase Resolved Surface Plasmon Interferometry of Graphene
- Tuning the pseudospin polarization of graphene by a pseudo-magnetic field
- Relative efficiency of polariton emission in two-dimensional materials
- Valley Polarization and Inversion in Strained Graphene via Pseudo-Landau Levels, Valley Splitting of Real Landau Levels and Confined States
- Graphenes flakes under controlled biaxial deformation
- Optical conductivity, Drude weight and plasmons in twisted graphene bilayers
- Perfect proton selectivity in ion transport through two-dimensional crystals
- Identifying suitable substrates for high-quality graphene-based heterostructures
- Graphene on Hexagonal Boron Nitride
- Strain Modulation of Graphene by Nanoscale Substrate Curvatures: A Molecular View
- Electrical 2π phase control of infrared light in a 350nm footprint using graphene plasmons
- Large tunable valley splitting in edge-free graphene quantum dots on boron nitride
- Dielectric screening of the Kohn anomaly of graphene on hexagonal boron nitride
- Pseudomagnetic fields and triaxial strain in graphene
- Local versus extended deformed graphene geometries for valley filtering
- Quantum Wires and Waveguides Formed in Graphene by Strain
- Electrical detection of hyperbolic phonon-polaritons in heterostructures of graphene and boron nitride
- Dynamical polarization of graphene under strain
- Graphene in periodic deformation fields: dielectric screening and plasmons
- Patched Green's function techniques for two dimensional systems: Electronic behaviour of bubbles and perforations in graphene
- Valley polarization braiding in strained graphene
- Probing the nanoscale origin of strain and doping in graphene-hBN heterostructures
- Electron dynamics in strained graphene
- Avoidance and Coalescence of Delamination Patterns
- Strain field in graphene induced by nanopillar mesh
- Evolution of the electronic band structure of twisted bilayer graphene upon doping
- Bubbles in graphene - a computational study