Microscopic description of intraband absorption in graphene: the occurrence of transient negative differential transmission
arXiv:1404.1609 · doi:10.1103/PhysRevLett.113.035502
Abstract
We present a microscopic explanation of the controversially discussed transient negative differential transmission observed in degenerate optical pump-probe measurements in graphene. Our approach is based on the density matrix formalism allowing a time- and momentum-resolved study of carrier-light, carrier-carrier, and carrier-phonon interaction on microscopic footing. We show that phonon-assisted optical intraband transitions give rise to transient absorption in the optically excited hot carrier system counteracting pure absorption bleaching of interband transitions. While interband transition bleaching is relevant in the first hundreds of fs after the excitation, intraband absorption sets in at later times. In particular, in the low excitation regime, these intraband absorption processes prevail over the absorption bleaching resulting in a zero-crossing of the differential transmission. Our findings are in good agreement with recent experimental pump-probe studies.
References in corpus (19)
- Universal Dynamic Conductivity and Quantized Visible Opacity of Suspended Graphene
- Measurement of the Optical Conductivity of Graphene
- Optical far-infrared properties of graphene monolayer and multilayers
- Kohn Anomalies and Electron-Phonon Interaction in Graphite
- The optical conductivity of graphene in the visible region of the spectrum
- A new electromagnetic mode in graphene
- Acoustic phonon scattering limited carrier mobility in 2D extrinsic graphene
- Measurement of Ultrafast Carrier Dynamics in Epitaxial Graphene
- Seeing many-body effects in single- and few-layer graphene: Observation of two-dimensional saddle-point excitons
- Carrier dynamics in epitaxial graphene close to the Dirac point
- Ultrafast Relaxation Dynamics of Hot Optical Phonons in Graphene
- Femtosecond carrier dynamics and saturable absorption in graphene suspensions
- Very Slow Cooling Dynamics of Photoexcited Carriers in Graphene Observed by Optical-Pump Terahertz-Probe Spectroscopy
- Slowing hot carrier relaxation in graphene using a magnetic field
- Observation of Intra- and Inter-band Transitions in the Optical Response of Graphene
- Carrier multiplication in graphene under Landau quantization
- Ultrafast carrier dynamics in pristine and FeCl3-intercalated bilayer graphene
- Optical characterization of electron-phonon interactions at the saddle point in graphene
- Negative differential transmission in graphene
Cited by in corpus (23)
- Dark excitons in transition metal dichalcogenides
- Terahertz Nonlinearity in Graphene Plasmons
- Carrier Dynamics and Transient Photobleaching in Thin Layers of Black Phosphorus
- Ultrafast pseudospin dynamics in graphene
- Graphene Terahertz Devices for Sensing and Communication
- Slow noncollinear Coulomb scattering in the vicinity of the Dirac point in graphene
- Population inversion in Landau-quantized graphene
- Strain-dependent exciton diffusion in transition metal dichalcogenides
- Impact of doping on the carrier dynamics in graphene
- Microscopic picture of electron-phonon interaction in two-dimensional halide perovskites
- Brightening of spin- and momentum-dark excitons in transition metal dichalcogenides
- Ultrafast Momentum Imaging of Pseudospin-Flip Excitations in Graphene
- Microscopic view on the ultrafast photoluminescence from photo-excited graphene
- Anisotropic Charge Carrier and Coherent Acoustic Phonon Dynamics of Black Phosphorus Studied by Transient Absorption Microscopy
- Quantum coherence in the dynamical excitation, ionization, and decaying of neon gas induced by X-ray laser
- Phonon-assisted processes in the ultraviolet transient optical response of graphene
- Optimizing the sensitivity of high repetition rate broadband transient optical spectroscopy with modified shot-to-shot detection
- Optical fingerprint of non-covalently functionalized transition metal dichalcogenides
- Symmetry-breaking supercollisions in Landau-quantized graphene
- Molecule signatures in photoluminescence spectra of transition metal dichalcogenides
- Unconventional double-bended saturation of optical transmission in graphene due to many-particle interactions
- On the interpretation of manifold ultrafast dynamics in supported graphene
- Ultrafast All-optical control of Multiple Light Degrees of Freedom through Mode-mixing in a Graphene Nanoribbon Metamaterial