Transit-time resonances enabling amplification and generation of terahertz radiation in periodic graphene p-i-n structures with the Zener-Klein interband tunneling
arXiv:2208.13525 · doi:10.1063/5.0124086
Abstract
The Zener-Klein (ZK) interband tunneling in graphene layers (GLs) with the lateral n-i-n and p-i-n junctions results in the nonlinear I-V characteristics that can be used for the rectification and detection of the terahertz (THz) signals. The transit time delay of the tunneling electrons and holes in the depletion regions leads to the phase shift between the THz current and THz voltage causing the negative dynamic conductance in a certain frequency range and resulting in the so-called transit-time (TT) instability. The combination of the ZK tunneling and the TT negative dynamic conductance enables resonant THz detection and the amplification and generation of THz radiation. We propose and evaluate the THz devices based on periodic cascade GL p-i-n structures exhibiting the TT resonances (GPIN-TTDs). Such structures can serve as THz amplifiers and, being placed in a Fabri-Perot cavity, or coupled to a THz antenna or using a ring oscillator connection, as THz radiation sources.
13 pages, 9 figures
References in corpus (9)
- Micrometer-scale ballistic transport in encapsulated graphene at room temperature
- Selective transmission of Dirac electrons and ballistic magnetoresistance of \textit{n-p} junctions in graphene
- Strong Coulomb drag and broken symmetry in double-layer graphene
- Carrier Recombination and Generation Rates for Intravalley and Intervalley Phonon Scattering in Graphene
- Amplified-reflection plasmon instabilities in grating-gate plasmonic crystals
- Reentrance effect in a graphene n-p-n junction coupled to a superconductor
- Collision dominated, ballistic, and viscous regimes of terahertz plasmonic detection by graphene
- Plasmonic Instabilities in Two-dimensional Electron Channels of Variable Width
- Resonant plasmonic terahertz detection in gated graphene p-i-n field-effect structures enabled by the Zener-Klein tunneling nonlinearity