Numerical simulation of plasma waves in a quasi-2D electron gas based on the Boltzmann transport equation

被引：0
作者：
Zeinab Kargar
Dino Ruić
Tobias Linn
Christoph Jungemann
机构：
[1] RWTH Aachen University,Chair of Electromagnetic Theory
来源：
Journal of Computational Electronics | 2017年 / 16卷
关键词：
Boltzmann equation; Plasma waves; Simulation; THz devices;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The calculation of plasma waves in a homogeneous quasi-2D electron gas is usually based on the Euler equation. It yields a dispersion relation with two branches, which are often referred to as Vlasov modes. Dyakonov and Shur were able to show that under certain boundary conditions for a constant current flow in a high electron mobility transistor these two modes can lead to a plasma instability and generation of THz waves. If, on the other hand, the more physics-based Boltzmann transport equation is solved for plasma waves, a multitude of modes is obtained in addition to the two Vlasov modes. In the case of nonequilibrium and high frequencies, it is no longer possible to identify the two Vlasov modes by simple means. This phenomenon is discussed in detail, and a method for the identification of the Vlasov modes is proposed. In addition, it is shown that for strong nonequilibrium the Dyakonov–Shur instability can be evaluated numerically using a method based on the Boltzmann transport equation.
引用
收藏
页码：487 / 496
页数：9
相关论文
共 70 条
[1]  
Woolard D(2005)Terahertz frequency sensing and imaging: a time of reckoning future applications? Proc. IEEE 93 1722-1743
[2]  
Brown E(2014)Terahertz plasmonics: good results and great expectations IEEE Microw. Mag. 15 43-50
[3]  
Pepper M(1993)Shallow water analogy for a ballistic field effect transistor: new mechanism of plasma wave generation by dc current Phys. Rev. Lett. 71 2465-2468
[4]  
Kemp M(1997)Contact boundary conditions and the Dyakonov–Shur instability in high electron mobility transistors J. Appl. Phys. 82 1242-1254
[5]  
Otsuji T(1996)Plasma wave electronics: novel terahertz devices using two dimensional electron fluid IEEE Trans. Electron Devices 43 1640-1645
[6]  
Shur M(2015)Numerical simulation of plasma oscillation in 2-d electron gas using a periodic steady-state solver IEEE Trans. Electron Devices 62 4192-4198
[7]  
Dyakonov M(2003)Plasma and transit-time mechanisms of the terahertz radiation detection in high-electron-mobility transistors Semicond. Sci. Technol. 18 460-109
[8]  
Shur M(2005)Resonant excitation of plasma oscillations in a partially gated two-dimensional electron layer J. Appl. Phys. 98 033510-1337
[9]  
Crowne FJ(2014)Global modeling of active terahertz plasmonic devices IEEE Trans. Terahertz Sci. Technol. 4 101-4408
[10]  
Dyakonov M(2009)Field effect transistors for terahertz detection: physics and first imaging applications J. Infrared Millim. Terahertz Waves 30 1319-6651
1234567