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、诊断和其他领域有着广泛的应用。 毫米波系统（频率范围：30-300 Ghz）发展相对较好。 由于缺乏合适的亚毫米波辐射源（SRS），亚毫米波（300- 3，000 Ghz）系统离实际实现还很远。对于SRS的理论设计，我们将采用非常规方式的亚微米二极管，即，由于瞬态过冲而不是稳定的负微分电导率引起的电荷积累。 初步结果表明，非传统制度的设备可以工作在高达500-800 GHz的频率。 为了解决这个问题，我们已经开发了一个复杂的程序的数值模拟的微波功率产生的两端器件占外部谐振电路。 一个软件包的程序是基于一个完整的动力学描述的设备操作在外部电路中使用的Monte Carlo粒子（MCP）技术。 第二个包是基于修改后的流体动力学方法（MHM），我们已经开发的DC和AC热载流子输运在半导体材料和器件的分析。 使用MHM和MCP方法，我们将广泛研究获得太赫兹波段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. ***