Hot-carrier photocurrent effects at graphene-metal interfaces
arXiv:1411.5665 · doi:10.1088/0953-8984/27/16/164207
Abstract
Photoexcitation of graphene leads to an interesting sequence of phenomena, some of which can be exploited in optoelectronic devices based on graphene. In particular, the efficient and ultrafast generation of an electron distribution with an elevated electron temperature and the concomitant generation of a photo-thermoelectric voltage at symmetry-breaking interfaces is of interest for photosensing and light harvesting. Here, we experimentally study the generated photocurrent at the graphene-metal interface, focusing on the time-resolved photocurrent, the effects of photon energy, Fermi energy and light polarization. We show that a single framework based on photo-thermoelectric photocurrent generation explains all experimental results.
References in corpus (38)
- Graphene Photonics and Optoelectronics
- Electronic transport in two dimensional graphene
- Ultrafast graphene photodetector
- Making graphene visible
- Hot Carrier-Assisted Intrinsic Photoresponse in Graphene
- Strong Plasmonic Enhancement of Photovoltage in Graphene
- Ultrafast Optical-Pump Terahertz-Probe Spectroscopy of the Carrier Relaxation and Recombination Dynamics in Epitaxial Graphene
- Photo-excitation Cascade and Multiple Carrier Generation in Graphene
- Sensitive Room-Temperature Terahertz Detection via Photothermoelectric Effect in Graphene
- Photo-Thermoelectric Effect at a Graphene Interface Junction
- Ultrafast collinear scattering and carrier multiplication in graphene
- Ultrafast Photoluminescence from Graphene
- Snapshots of non-equilibrium Dirac carrier distributions in graphene
- Hot Carrier Transport and Photocurrent Response in Graphene
- Anomalous thermoelectric transport of Dirac particles in graphene
- Gate-activated photoresponse in a graphene p-n junction
- Direct view on the ultrafast carrier dynamics in graphene
- The role of contacts in graphene transistors: A scanning photocurrent study
- Photocurrent measurements of supercollision cooling in graphene
- Disorder-Assisted Electron-Phonon Scattering and Cooling Pathways in Graphene
- Carrier Multiplication in Graphene
- Intrinsic response time of graphene photodetectors
- Supercollision cooling in undoped graphene
- Non-equilibrium dynamics of photo-excited electrons in graphene: collinear scattering, Auger processes, and the impact of screening
- Theory of thermopower in 2D graphene
- Photo-thermoelectric and photoelectric contributions to light detection in metal-graphene-metal photodetectors
- Very Slow Cooling Dynamics of Photoexcited Carriers in Graphene Observed by Optical-Pump Terahertz-Probe Spectroscopy
- Semiconducting-to-metallic photoconductivity crossover and temperature-dependent Drude weight in graphene
- Extreme sensitivity of graphene photoconductivity to environmental gases
- Impact of Auger processes on carrier dynamics in graphene
- Competing Ultrafast Energy Relaxation Pathways in Photoexcited Graphene
- Photo-excited Carrier Dynamics and Impact Excitation Cascade in Graphene
- Anisotropy of excitation and relaxation of photogenerated Dirac electrons in graphene
- Competing Channels for Hot Electron Cooling in Graphene
- Phonon-mediated mid-infrared photoresponse of graphene
- Observation of suppressed terahertz absorption in photoexcited graphene
- Substrate Sensitive Mid-Infrared Photoresponse in Graphene
- Polarization dependence of photocurrent in a metal-graphene-metal device
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- Surface plasmon polariton graphene photodetectors
- Near-field photocurrent nanoscopy on bare and encapsulated graphene
- Ultrafast intrinsic optical-to-electrical conversion dynamics in graphene photodetector
- Extraordinary linear dynamic range in laser-defined functionalized graphene photodetectors
- Graphene-based light sensing: fabrication, characterisation, physical properties and performance
- Light-Driven Nanoscale Vectorial Currents
- Slow noncollinear Coulomb scattering in the vicinity of the Dirac point in graphene
- Plasmonic graphene photodetector based on channel photo-thermoelectric effect
- An integrated and multi-purpose microscope for the characterization of atomically thin optoelectronic devices
- Zero-bias photodetection in 2d materials via geometric design of contacts
- Tunable Ultrafast Thermal Relaxation in Graphene Measured by Continuous-Wave Photomixing
- Photo-thermoelectric detection of cyclotron resonance in asymmetrically carrier-doped graphene two-terminal device
- Photo-Nernst detection of cyclotron resonance in partially irradiated graphene
- Interface defect-assisted phonon scattering of hot carriers in graphene
- Polarization-resolving graphene-based mid-infrared detector
- Photo-accelerated water dissociation across one-atom-thick electrodes
- Theory of the effective Seebeck coefficient for photoexcited 2D materials: the case of graphene
- Photoexcitation Cascade and Quantum-Relativistic Jets in Graphene
- Photon drag at the junction between metal and 2d semiconductor
- Exact theory of edge diffraction and launching of transverse electric plasmons at two-dimensional junctions
- Intrinsic ultrafast edge photocurrent dynamics in WTe driven by broken crystal symmetry