Terahertz Microwave Generators from Submicron n+ -n-n+ Diodes

9526112 Mitin固态毫米波和亚毫米波系统在通信，雷达，诊断和其他领域得到广泛应用。毫米波系统（频率范围：30- 300ghz）相对发达。由于缺乏合适的亚毫米波辐射源（SRS），亚毫米波（300-3,000 Ghz）系统距离实际实现还很遥远。对于SRS的理论设计，我们将采用非常规的亚微米二极管，即由于瞬态超调而不是平稳的负微分电导率而引起的电荷积累。初步结果表明，非常规体制器件可以在高达500-800 Ghz的频率下工作。为了解决这个问题，我们开发了一套复杂的程序，用于计算外谐振电路中双端器件微波发电的数值模拟。一个程序包是基于一个完整的动力学描述的设备操作在一个外部电路使用蒙特卡罗粒子（MCP）技术。第二个封装基于改进的流体动力学方法（MHM），我们已经开发了用于分析半导体材料和器件中的直流和交流热载子输运的方法。利用MHM和MCP方法，我们将广泛研究在太赫兹波段获得微波二极管发生器的可能性。＊＊＊

9526112 Mitin Solid state millimeter and submillimeter wave systems find wide application in communications, radar, diagnostics, and other fields. Millimeter wave system (frequency range: 30-300 Ghz) are relatively well developed. Submillimeter wave (300-3,000 Ghz) systems are still far from practical realization, due to a lack of suitable submillimeter radiation sources (SRS). For the theoretical design of SRS, we will employ submicron diodes in a nonconventional regime, i.e., charge accumulation due to transient overshoot rather than stationary negative differential conductivity. Preliminary results demonstrate that nonconventional regime devices can operate at frequencies as high as 500-800 Ghz. To attack this problem, we have developed a complex of programs for the numerical simulation of microwave power generation in two-terminal devices which account for the external resonant circuit. One package of programs is based on a full kinetic description of device operation in an external circuit using the Monte Carlo particle (MCP) technique. A second package is based on a modified hydrodynamic method (MHM) we have developed for the analysis of dc and ac hot-carrier transport in semiconductor materials and devices. Using MHM and MCP methods, we will extensively investigate the possibility of obtaining microwave diode generators in the terahertz regime. ***