Tunable phonon-induced transparency in bilayer graphene nanoribbons

Abstract

In the phenomenon of electromagnetically induced transparency1 (EIT) of a three-level atomic system, the linear susceptibility at the dipole-allowed transition is canceled through destructive interference of the direct transition and an indirect transition pathway involving a meta-stable level, enabled by optical pumping. EIT not only leads to light transmission at otherwise opaque atomic transition frequencies, but also results in the slowing of light group velocity and enhanced optical nonlinearity. In this letter, we report an analogous behavior, denoted as phonon-induced transparency (PIT), in AB-stacked bilayer graphene nanoribbons. Here, light absorption due to the plasmon excitation is suppressed in a narrow window due to the coupling with the infrared active Γ-point optical phonon, whose function here is similar to that of the meta-stable level in EIT of atomic systems. We further show that PIT in bilayer graphene is actively tunable by electrostatic gating, and estimate a maximum slow light factor of around 500 at the phonon frequency of 1580 cm-1, based on the measured spectra. Our demonstration opens an avenue for the exploration of few-photon non-linear optics and slow light in this novel two-dimensional material, without external optical pumping and at room temperature.

4 figures, submitted

References in corpus (11)

• The Raman Fingerprint of Graphene
• Gate-tuning of graphene plasmons revealed by infrared nano-imaging
• Optical nano-imaging of gate-tuneable graphene plasmons
• Optomechanically induced transparency
• Dielectric function, screening, and plasmons in 2D graphene
• Asymmetry gap in the electronic band structure of bilayer graphene
• Manipulating infrared photons using plasmons in transparent graphene superlattices
• Dynamical polarization of graphene at finite doping
• Mid-infrared plasmons in scaled graphene nanostructures
• Classical Analogue of Electromagnetically Induced Transparency with a Metal-Superconductor Hybrid Metamaterial
• Charged-phonon theory and Fano effect in the optical spectroscopy of bilayer graphene

Cited by in corpus (20)

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• Electronic properties of graphene-based bilayer systems
• Tunable light-matter interaction and the role of hyperbolicity in graphene-hBN system
• Electronic and optical properties of graphene nanoribbons in external fields
• Strong and broadly tunable plasmon resonances in thick films of aligned carbon nanotubes
• Coherent plasmon and phonon-plasmon resonances in carbon nanotubes
• Plasmons in the van der Waals charge-density-wave material 2H-TaSe2
• Dirac Cone in two dimensional bilayer graphene by intercalation with V, Nb, and Ta transition metals
• Superluminal plasmons with resonant gain in population inverted bilayer graphene
• Tunable plasmons in large area WTe2 thin films
• Tip-and plasmon-enhanced infrared nanoscopy for ultrasensitive molecular characterizations
• Graphene plasmon-phonon coupled modes at the exceptional point
• Polaritonic Quantum Matter
• Imaging Stacking-Dependent Surface Plasmon Polaritons in Trilayer Graphene
• Strong plasmon-phonon splitting and hybridization in 2D materials revealed through a self-energy approach
• Photonic Spin Hall Effect using bilayer Graphene in Nano Optomechanical Cavities
• Possible dimensionality transition behavior in localized plasmon resonances of confinement-controlled graphene devices
• Control with EIT: High energy charged particle detection
• Hybridization of edge modes with substrate phonons