Terahertz Radiation from the Dyakonov-Shur Instability of Hydrodynamic Electrons in a Corbino Geometry
arXiv:2112.07683 · doi:10.1103/PhysRevB.106.195432
Abstract
Hydrodynamic electrons flowing through a two-dimensional channel are predicted to undergo a plasma instability above a critical drift velocity. This Dyakonov-Shur (DS) instability terminates as a coherent nonlinear oscillator which shows promise as a source of radiation that could fill the so-called TeraHertz gap. In this work, we study radial flow in a Corbino disk, and demonstrate how the DS instability is substantially enhanced in this geometry, both in terms of a lower critical drift velocity and a higher generated power. Interestingly, hydrodynamic electron flows were recently reported in a graphene sample of this geometry, and our results are therefore directly relevant to current efforts to detect this experimentally elusive phenomenon. The analysis is based on a hydrodynamic approach and features both linearized calculations as well as full numerical simulations of the Navier-Stokes equation.
arXiv comment8 pages, 5 figures
References in corpus (49)
- Van der Waals heterostructures
- Two-dimensional materials from high-throughput computational exfoliation of experimentally known compounds
- Negative local resistance caused by viscous electron backflow in graphene
- Observation of the Dirac fluid and the breakdown of the Wiedemann-Franz law in graphene
- Evidence for hydrodynamic electron flow in PdCoO
- Superballistic flow of viscous electron fluid through graphene constrictions
- Electron Viscosity, Current Vortices and Negative Nonlocal Resistance in Graphene
- Imaging viscous flow of the Dirac fluid in graphene
- Hydrodynamic electron flow in high-mobility wires
- Measuring Hall Viscosity of Graphene's Electron Fluid
- Visualizing Poiseuille flow of hydrodynamic electrons
- Electrical and Thermal Transport at the Planckian Bound of Dissipation in the Hydrodynamic Electron Fluid of WP2
- Non-local transport and the hydrodynamic shear viscosity in graphene
- Hydrodynamic description of transport in strongly correlated electron systems
- Higher-Than-Ballistic Conduction of Viscous Electron Flows
- Negative magnetoresistance in viscous flow of two-dimensional electrons
- Hydrodynamic Electron Flow and Hall Viscosity
- Bulk and shear viscosities of the 2D electron liquid in a doped graphene sheet
- Hydrodynamic approach to electronic transport in graphene
- Scanning Gate Microscopy in a Viscous Electron Fluid
- Theory of the plasma-wave photoresponse of a gated graphene sheet
- Phonon Emission from a 2D Electron Gas: Evidence of Transition to the Hydrodynamic Regime
- A Corbino disk viscometer for 2D quantum electron liquids
- Electronic hydrodynamics in graphene
- Hydrodynamic-to-ballistic crossover in Dirac fluid
- Hydrodynamic electron transport and nonlinear waves in graphene
- Geometric control of universal hydrodynamic flow in a two dimensional electron fluid
- Transport properties of strongly coupled electron-phonon liquids
- Ballistic and hydrodynamic magnetotransport in narrow channels
- Hydrodynamic and ballistic transport over large length scales in GaAs/AlGaAs
- Microscopic theory for electron hydrodynamics in monolayer and bilayer graphene
- Imaging Hydrodynamic Electrons Flowing Without Landauer-Sharvin Resistance
- Stokes paradox in electronic Fermi liquids
- Kinetic theory of transport for inhomogeneous electron fluids
- A classical mechanism for negative magnetoresistance in two-dimensional systems in the ballistic regime
- Particle Collisions and Negative Nonlocal Response of Ballistic Electrons
- Hall viscosity and electromagnetic response of electrons in graphene
- Viscous magnetoresistance of correlated electron liquids
- Hydrodynamic theory of the Dyakonov-Shur instability in graphene transistors
- Freely flowing currents and electric field expulsion in viscous electronics
- Spread and erase -- How electron hydrodynamics can eliminate the Landauer-Sharvin resistance
- Coherent Terahertz Radiation from a Nonlinear Oscillator of Viscous Electrons
- Pseudo-Euler equations from nonlinear optics: plasmon-assisted photodetection beyond hydrodynamics
- Prospects for the detection of electronic pre-turbulence in graphene
- Hydrodynamic thermoelectric transport in Corbino geometry
- Exact solution for driven oscillations in plasmonic field-effect transistors
- Dyakonov-Shur instability across the ballistic-to-hydrodynamic crossover
- Singularity-enhanced terahertz detection in high-mobility field-effect transistors
- Entropy Wave Instability in Dirac and Weyl Semimetals