CAJ | 학술논문

为了对LRSPPs自发辐射的低噪声放大特性进行深入研究，采用建立长程表面等离子激元(LRSPPs)波导结构和自辐射低噪声放大理论模型的方法，对结构的电磁场分布特性进行了计算仿真，使得设计结构符合LRSPPs传播特性。放大噪声的仿真结果表明：短程表面等离子激元(SRSPPs)大部分自发辐射倏逝到金属区；每单元带宽的有效输入噪声功率达到了7.47×10-4 fW/Hz，为常见的相位不敏感放大信号的理论值3倍，表现为THz信号；IR140激发分子的衰变是无辐射的过程，100 nm处自辐射衰减率为SRSPPs和LRSPPs的拐点，之后的辐射过程主要是受自发辐射LRSPPs影响决定。上述研究成果不仅可以明确LRSPPs特性，同时对于其他支持等离子模式的结构也有明显的参考价值。
위료대LRSPPs자발복사적저조성방대특성진행심입연구，채용건립장정표면등리자격원(LRSPPs)파도결구화자복사저조성방대이론모형적방법，대결구적전자장분포특성진행료계산방진，사득설계결구부합LRSPPs전파특성。방대조성적방진결과표명：단정표면등리자격원(SRSPPs)대부분자발복사숙서도금속구；매단원대관적유효수입조성공솔체도료7.47×10-4 fW/Hz，위상견적상위불민감방대신호적이론치3배，표현위THz신호；IR140격발분자적쇠변시무복사적과정，100 nm처자복사쇠감솔위SRSPPs화LRSPPs적괴점，지후적복사과정주요시수자발복사LRSPPs영향결정。상술연구성과불부가이명학LRSPPs특성，동시대우기타지지등리자모식적결구야유명현적삼고개치。
Long-range surface plasmon polaritons(LRSPPs) which express characteristics of long distances and low-loss are very hot in the plasmonic devices field. In order to conduct deeply research on low noise amplification of spontaneous emission in the LRSPPs, a waveguide structure and its theoretical model of radiation low-noise amplifier were set up. Then this structure was verified through the simulation calculation of the electromagnetic field distribution, which indicated that short-range surface plasmon polaritons (SRSPPs) are evanescent in metal district by spontaneous radiation, the effective noise power of each unit bandwidth reached to 7.47 ×10 -4 fW/Hz, three times to common signal amplifier, which expressed THz signal, the decay of IR140 excited molecules is the process without radiation, in which 100 nm at self-radiative decay rate becomes the inflection point for SRSPPs and LRSPPs, and after the inflection point the radiation process is mainly affected by the spontaneous radiation of LRSPPs.These results not only clear the characteristics of LRSPPs, but also have significant reference value for other plasma models.