Tuning Optical Conductivity of Large-Scale CVD Graphene by Strain Engineering

Abstract

Strain engineering has been recently recognized as an effective way to tailor the electrical properties of graphene. In the optical domain, effects such as strain-induced anisotropic absorption add an appealing functionality to graphene, opening the prospect for atomically thin optical elements. Indeed, graphene is currently one of the notable players in the intense drive towards bendable, thin, and portable electronic displays, where its intrinsically metallic, optically transparent, and mechanically robust nature are major advantages. Given that the intrinsic transparency of a graphene monolayer is 97.7 %, any small, reproducible, controllable, and potentially reversible modulation of transparency can have a significant impact for graphene as a viable transparent conducting electrode. Even more so, if the degree of modulation is polarization dependent. Here we show that the transparency in the visible range of graphene pre-strained on a Polyethylene terephthalate (PET) substrate exhibits a periodic modulation (0.1 %) as a function of polarization direction, which we interpret as strain-induced optical anisotropy. The degree of anisotropy is varied by reversible external manipulation of the level of pre-strain. The magnitude of strain is monitored independently by optical absorption and Raman spectroscopy, and the experimental observations are consistent with the theoretically expected modification of the optical conductivity of graphene arising from the strain-induced changes in the electronic dispersion of graphene. The strain sensitivity of the optical response of graphene demonstrated in this study can be potentially utilized towards novel ultra-thin optical devices and strain sensing applications.

18 pages, 4 figures

References in corpus (12)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
• Uniaxial Strain in Graphene by Raman Spectroscopy: G peak splitting, Gruneisen Parameters and Sample Orientation
• A tight-binding approach to uniaxial strain in graphene
• All-graphene integrated circuits via strain engineering
• Design of Tunable Biperiodic Graphene Metasurfaces
• Zero modes of tight binding electrons on the honeycomb lattice
• Graphene field effect transistors with ferroelectric gating
• Graphene-Ferroelectric Hybrid Structure for Flexible Transparent Electrodes
• Quasi-Periodic Nanoripples in Graphene Grown by Chemical Vapor Deposition and Its Impact on Charge Transport
• Optical Properties of Strained Graphene

Cited by in corpus (35)

• Electronic and optical properties of strained graphene and other strained 2D materials: a review
• Tunable and high purity room-temperature single photon emission from atomic defects in hexagonal boron nitride
• Novel effects of strains in graphene and other two dimensional materials
• Thermal Conductivity of Suspended Graphene with Defects
• Raman Optothermal Technique for Measuring Thermal Conductivity of Graphene and Related Materials
• The deformation of wrinkled graphene
• Strain superlattices and macroscale suspension of Graphene induced by corrugated substrates
• Generalizing the Fermi velocity of strained graphene from uniform to nonuniform strain
• Microscopic imaging of elastic deformation in diamond via in-situ stress tensor sensors
• Anisotropic AC conductivity of strained graphene
• Subwavelength THz imaging of graphene photoconductivity
• Effective Dirac Hamiltonian for anisotropic honeycomb lattices: optical properties
• Tunable dichroism and optical absorption of graphene by strain engineering
• Topological flat bands in time-periodically driven uniaxial strained graphene nanoribbons
• Low-energy theory for strained graphene: an approach up to second-order in the strain tensor
• Magneto-optical conductivity of anisotropic two-dimensional Dirac-Weyl materials
• Spectral butterfly, mixed Dirac-Schrödinger fermion behavior and topological states in armchair uniaxial strained graphene
• Optical Hall effect in strained graphene
• Transport properties through graphene grain boundaries: strain effects versus lattice symmetry
• Strain-induced conduction gap in vertical devices made of twisted graphene layers
• Effect of uniaxial strain on the optical Drude scattering in graphene
• Fingerprints of a position-dependent Fermi velocity on scanning tunnelling spectra of strained graphene
• Avoidance and Coalescence of Delamination Patterns
• Sound waves induce Volkov-like states, band structure and collimation effect in graphene
• A critical analysis on the sensitivity enhancement of surface plasmon resonance sensors with graphene
• Tunable Electronic Band Structures and Zero-Energy Modes of Heterosubstrate-induced Graphene Superlattices
• Unveiling optical in-plane anisotropy of 2D materials from oblique incidence of light
• Conduction gap in graphene strain junctions: direction dependence
• Coupled Mode Theory of Optomechanical Crystals
• Theory for strained graphene beyond the Cauchy-Born rule
• Strain- and doping-tunable optical resonance in Kekulé-Y graphene
• Effect of resonant impurity scattering of carriers on Drude peak broadening in uniaxially strained graphene
• Coherent states for dispersive pseudo-Landau-levels in strained honeycomb lattices
• Impurity induced broadening of Drude peak in strained graphene
• Mechanical Modulation of Hybrid Graphene Microfiber Structure