Numerical Simulation of Plasma Oscillation in 2-D Electron Gas Using a Periodic Steady-State Solver
Numerical Simulation of Plasma Oscillation in 2-D Electron Gas Using a Periodic Steady-State Solver
复制标题
使用周期性稳态求解器对二维电子气中的等离子体振荡进行数值模拟
DOI：
10.1109/ted.2015.2489220
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发表时间：
2015
影响因子：
3.1
通讯作者：
Jae‐Hyung Jang
中科院分区：
文献类型：
--
作者：
Sung;Jae‐Hyung Jang
利用自行开发的器件模拟器G-Device对二维电子气中等离子体不稳定性引起的太赫兹振荡进行了数值研究。为了克服传统暂态仿真中的实际困难，实现了周期稳态（PSS）求解器。完整的牛顿-拉夫森格式适用于一组离散方程在不同的时间点在振荡期间采样。数值结果表明，存在一个允许PSS振荡的注入速度阈值。此外，漏极负载电阻对振荡幅度的影响进行了估计。结果发现，即使在有限的漏极电阻下，也可以实现相当大的电压振荡幅度。虽然电压振荡的增长率表现出其最大值与无穷大的漏极电阻，最大输出功率是在有限的漏极电阻。
The terahertz oscillation due to the plasma instability in the 2-D electron gas is numerically investigated using an in-house developed device simulator, G-Device. In order to overcome practical difficulties in the conventional transient simulation, a periodic steady-state (PSS) solver is implemented. The full Newton-Raphson scheme is applied to a set of discretized equations sampled at various time points during an oscillation period. Numerical results show that there is a threshold value of the injection velocity that allows the PSS oscillation. Moreover, the impact of the drain load resistance on the oscillation amplitude is estimated. It is found that considerable amplitude of the voltage oscillation can be achieved even with finite drain resistances. Although the growth rate of the voltage oscillation exhibits its maximum value with the infinite drain resistance, the maximum output power is obtained at a finite drain resistance.