Due to size, computational and power limitations an integrated nanosensor device needs to be redesigned with a limited number of components. A sensorless event detection node can overcome these limitations where such node can be powered using energy harvested from various events. The harvested energy could also be a significant factor for events detection without using any sensors. This study presents a detailed description of a sensorless event detection node which consists of two components — an energy harvester and a pulse generator. We discuss the state of the art configurations for these two components. However, due to the low complexity of the nanoscale device, the pulse generator should be kept simple. We, therefore, theoretically investigate different approaches for the pulse generator to generate Surface Plasmon Polaritons (SPPs) which reasonably resemble femtoseconds long pulses in graphene. Based on our analysis, we find that SPPs can be excited using a near-field excitation method for the THz band which is simple and can produce Electromagnetic (EM) radiation with a wide range of high wavenumber. Hence, the coupling condition can be easily satisfied and consequently, the SPP wave can be excited. However, such method excites SPPs locally, which requires improvement in practice. Thus we numerically investigate how operating frequency, the doping amount of graphene and the properties of the evanescent source affect the plasmon resonance of SPPs. We also studied different evanescent sources such as electric dipole, and hexapole, and find that the former provides better SPP resonance. We also observe that through fine-tuning of the chemical potential, frequency and source phase angle, higher amplitude SPPs can be excited on graphene surface in the THz band. The proposed model can be a good candidate for a low-complexity realization of a THz pulse generator in self-powered sensorless events detection node.

由于尺寸，计算和功率限制，需要重新设计具有有限数量的组件的集成纳米传感器设备。无传感器事件检测节点可以克服这些限制，在这种限制下，可以使用从各种事件中收集的能量为该节点供电。在不使用任何传感器的情况下，收集的能量也可能是事件检测的重要因素。这项研究对无传感器事件检测节点进行了详细描述，该节点由两个部分组成-能量收集器和脉冲发生器。我们讨论了这两个组件的最新配置。然而，由于纳米级设备的低复杂性，脉冲发生器应保持简单。因此，我们 理论上研究了脉冲发生器产生表面等离激元极化子（SPPs）的不同方法，该方法合理地类似于石墨烯中飞秒级的脉冲。根据我们的分析，我们发现，对于THz频段，可以使用近场激励方法来激励SPP，该方法很简单，并且可以产生宽范围高波数的电磁（EM）辐射。因此，可以容易地满足耦合条件，并且因此可以激励SPP波。然而，这种方法局部地激发SPP，这需要实践上的改进。因此，我们数值研究了工作频率，石墨烯的掺杂量和van逝源的性质如何影响SPP的等离子体共振。我们还研究了不同的e逝源，例如电偶极子和六极子，并发现前者提供了更好的SPP共振。我们还观察到，通过化学势，频率和源相角的微调，可以在太赫兹频段的石墨烯表面激发更高振幅的SPP。所提出的模型可以很好地实现自供电无传感器事件检测节点中太赫兹脉冲发生器的低复杂度实现。